diff --git a/concepts/control-flow/.meta/config.json b/concepts/control-flow/.meta/config.json
new file mode 100644
index 00000000..52914445
--- /dev/null
+++ b/concepts/control-flow/.meta/config.json
@@ -0,0 +1,7 @@
+{
+    "blurb": "<todo>",
+    "authors": [
+        "misicnenad"
+    ],
+    "contributors": []
+}
diff --git a/concepts/control-flow/about.md b/concepts/control-flow/about.md
new file mode 100644
index 00000000..0ca4f252
--- /dev/null
+++ b/concepts/control-flow/about.md
@@ -0,0 +1 @@
+# Control Flow
diff --git a/concepts/control-flow/introduction.md b/concepts/control-flow/introduction.md
new file mode 100644
index 00000000..e10b99d0
--- /dev/null
+++ b/concepts/control-flow/introduction.md
@@ -0,0 +1 @@
+# Introduction
diff --git a/concepts/control-flow/links.json b/concepts/control-flow/links.json
new file mode 100644
index 00000000..fe51488c
--- /dev/null
+++ b/concepts/control-flow/links.json
@@ -0,0 +1 @@
+[]
diff --git a/config.json b/config.json
index aa9eeec6..0ca4174d 100644
--- a/config.json
+++ b/config.json
@@ -87,6 +87,17 @@
         ],
         "prerequisites": [],
         "difficulty": 1
+      },
+      {
+        "slug": "beer-song",
+        "name": "Beer Song",
+        "uuid": "d96a8ba2-6e80-45ce-91d6-5b4cac391db6",
+        "practices": [
+          "control-flow",
+          "strings"
+        ],
+        "prerequisites": [],
+        "difficulty": 2
       }
     ]
   },
@@ -130,6 +141,11 @@
       "uuid": "52684fe6-9b8d-4974-8de4-f65d42fbf9c1",
       "slug": "external-crates",
       "name": "Packages and Crates"
+    },
+    {
+      "uuid": "887864e6-8d80-433c-8a1e-b11a5f79ae35",
+      "slug": "control-flow",
+      "name": "Control Flow"
     }
   ],
   "key_features": [
diff --git a/exercises/practice/beer-song/.docs/instructions.md b/exercises/practice/beer-song/.docs/instructions.md
new file mode 100644
index 00000000..7d1ccd66
--- /dev/null
+++ b/exercises/practice/beer-song/.docs/instructions.md
@@ -0,0 +1,308 @@
+# Instructions
+
+Recite the lyrics to that beloved classic, that field-trip favorite: 99 Bottles
+of Beer on the Wall.
+
+Note that not all verses are identical.
+
+```text
+99 bottles of beer on the wall, 99 bottles of beer.
+Take one down and pass it around, 98 bottles of beer on the wall.
+
+98 bottles of beer on the wall, 98 bottles of beer.
+Take one down and pass it around, 97 bottles of beer on the wall.
+
+97 bottles of beer on the wall, 97 bottles of beer.
+Take one down and pass it around, 96 bottles of beer on the wall.
+
+96 bottles of beer on the wall, 96 bottles of beer.
+Take one down and pass it around, 95 bottles of beer on the wall.
+
+95 bottles of beer on the wall, 95 bottles of beer.
+Take one down and pass it around, 94 bottles of beer on the wall.
+
+94 bottles of beer on the wall, 94 bottles of beer.
+Take one down and pass it around, 93 bottles of beer on the wall.
+
+93 bottles of beer on the wall, 93 bottles of beer.
+Take one down and pass it around, 92 bottles of beer on the wall.
+
+92 bottles of beer on the wall, 92 bottles of beer.
+Take one down and pass it around, 91 bottles of beer on the wall.
+
+91 bottles of beer on the wall, 91 bottles of beer.
+Take one down and pass it around, 90 bottles of beer on the wall.
+
+90 bottles of beer on the wall, 90 bottles of beer.
+Take one down and pass it around, 89 bottles of beer on the wall.
+
+89 bottles of beer on the wall, 89 bottles of beer.
+Take one down and pass it around, 88 bottles of beer on the wall.
+
+88 bottles of beer on the wall, 88 bottles of beer.
+Take one down and pass it around, 87 bottles of beer on the wall.
+
+87 bottles of beer on the wall, 87 bottles of beer.
+Take one down and pass it around, 86 bottles of beer on the wall.
+
+86 bottles of beer on the wall, 86 bottles of beer.
+Take one down and pass it around, 85 bottles of beer on the wall.
+
+85 bottles of beer on the wall, 85 bottles of beer.
+Take one down and pass it around, 84 bottles of beer on the wall.
+
+84 bottles of beer on the wall, 84 bottles of beer.
+Take one down and pass it around, 83 bottles of beer on the wall.
+
+83 bottles of beer on the wall, 83 bottles of beer.
+Take one down and pass it around, 82 bottles of beer on the wall.
+
+82 bottles of beer on the wall, 82 bottles of beer.
+Take one down and pass it around, 81 bottles of beer on the wall.
+
+81 bottles of beer on the wall, 81 bottles of beer.
+Take one down and pass it around, 80 bottles of beer on the wall.
+
+80 bottles of beer on the wall, 80 bottles of beer.
+Take one down and pass it around, 79 bottles of beer on the wall.
+
+79 bottles of beer on the wall, 79 bottles of beer.
+Take one down and pass it around, 78 bottles of beer on the wall.
+
+78 bottles of beer on the wall, 78 bottles of beer.
+Take one down and pass it around, 77 bottles of beer on the wall.
+
+77 bottles of beer on the wall, 77 bottles of beer.
+Take one down and pass it around, 76 bottles of beer on the wall.
+
+76 bottles of beer on the wall, 76 bottles of beer.
+Take one down and pass it around, 75 bottles of beer on the wall.
+
+75 bottles of beer on the wall, 75 bottles of beer.
+Take one down and pass it around, 74 bottles of beer on the wall.
+
+74 bottles of beer on the wall, 74 bottles of beer.
+Take one down and pass it around, 73 bottles of beer on the wall.
+
+73 bottles of beer on the wall, 73 bottles of beer.
+Take one down and pass it around, 72 bottles of beer on the wall.
+
+72 bottles of beer on the wall, 72 bottles of beer.
+Take one down and pass it around, 71 bottles of beer on the wall.
+
+71 bottles of beer on the wall, 71 bottles of beer.
+Take one down and pass it around, 70 bottles of beer on the wall.
+
+70 bottles of beer on the wall, 70 bottles of beer.
+Take one down and pass it around, 69 bottles of beer on the wall.
+
+69 bottles of beer on the wall, 69 bottles of beer.
+Take one down and pass it around, 68 bottles of beer on the wall.
+
+68 bottles of beer on the wall, 68 bottles of beer.
+Take one down and pass it around, 67 bottles of beer on the wall.
+
+67 bottles of beer on the wall, 67 bottles of beer.
+Take one down and pass it around, 66 bottles of beer on the wall.
+
+66 bottles of beer on the wall, 66 bottles of beer.
+Take one down and pass it around, 65 bottles of beer on the wall.
+
+65 bottles of beer on the wall, 65 bottles of beer.
+Take one down and pass it around, 64 bottles of beer on the wall.
+
+64 bottles of beer on the wall, 64 bottles of beer.
+Take one down and pass it around, 63 bottles of beer on the wall.
+
+63 bottles of beer on the wall, 63 bottles of beer.
+Take one down and pass it around, 62 bottles of beer on the wall.
+
+62 bottles of beer on the wall, 62 bottles of beer.
+Take one down and pass it around, 61 bottles of beer on the wall.
+
+61 bottles of beer on the wall, 61 bottles of beer.
+Take one down and pass it around, 60 bottles of beer on the wall.
+
+60 bottles of beer on the wall, 60 bottles of beer.
+Take one down and pass it around, 59 bottles of beer on the wall.
+
+59 bottles of beer on the wall, 59 bottles of beer.
+Take one down and pass it around, 58 bottles of beer on the wall.
+
+58 bottles of beer on the wall, 58 bottles of beer.
+Take one down and pass it around, 57 bottles of beer on the wall.
+
+57 bottles of beer on the wall, 57 bottles of beer.
+Take one down and pass it around, 56 bottles of beer on the wall.
+
+56 bottles of beer on the wall, 56 bottles of beer.
+Take one down and pass it around, 55 bottles of beer on the wall.
+
+55 bottles of beer on the wall, 55 bottles of beer.
+Take one down and pass it around, 54 bottles of beer on the wall.
+
+54 bottles of beer on the wall, 54 bottles of beer.
+Take one down and pass it around, 53 bottles of beer on the wall.
+
+53 bottles of beer on the wall, 53 bottles of beer.
+Take one down and pass it around, 52 bottles of beer on the wall.
+
+52 bottles of beer on the wall, 52 bottles of beer.
+Take one down and pass it around, 51 bottles of beer on the wall.
+
+51 bottles of beer on the wall, 51 bottles of beer.
+Take one down and pass it around, 50 bottles of beer on the wall.
+
+50 bottles of beer on the wall, 50 bottles of beer.
+Take one down and pass it around, 49 bottles of beer on the wall.
+
+49 bottles of beer on the wall, 49 bottles of beer.
+Take one down and pass it around, 48 bottles of beer on the wall.
+
+48 bottles of beer on the wall, 48 bottles of beer.
+Take one down and pass it around, 47 bottles of beer on the wall.
+
+47 bottles of beer on the wall, 47 bottles of beer.
+Take one down and pass it around, 46 bottles of beer on the wall.
+
+46 bottles of beer on the wall, 46 bottles of beer.
+Take one down and pass it around, 45 bottles of beer on the wall.
+
+45 bottles of beer on the wall, 45 bottles of beer.
+Take one down and pass it around, 44 bottles of beer on the wall.
+
+44 bottles of beer on the wall, 44 bottles of beer.
+Take one down and pass it around, 43 bottles of beer on the wall.
+
+43 bottles of beer on the wall, 43 bottles of beer.
+Take one down and pass it around, 42 bottles of beer on the wall.
+
+42 bottles of beer on the wall, 42 bottles of beer.
+Take one down and pass it around, 41 bottles of beer on the wall.
+
+41 bottles of beer on the wall, 41 bottles of beer.
+Take one down and pass it around, 40 bottles of beer on the wall.
+
+40 bottles of beer on the wall, 40 bottles of beer.
+Take one down and pass it around, 39 bottles of beer on the wall.
+
+39 bottles of beer on the wall, 39 bottles of beer.
+Take one down and pass it around, 38 bottles of beer on the wall.
+
+38 bottles of beer on the wall, 38 bottles of beer.
+Take one down and pass it around, 37 bottles of beer on the wall.
+
+37 bottles of beer on the wall, 37 bottles of beer.
+Take one down and pass it around, 36 bottles of beer on the wall.
+
+36 bottles of beer on the wall, 36 bottles of beer.
+Take one down and pass it around, 35 bottles of beer on the wall.
+
+35 bottles of beer on the wall, 35 bottles of beer.
+Take one down and pass it around, 34 bottles of beer on the wall.
+
+34 bottles of beer on the wall, 34 bottles of beer.
+Take one down and pass it around, 33 bottles of beer on the wall.
+
+33 bottles of beer on the wall, 33 bottles of beer.
+Take one down and pass it around, 32 bottles of beer on the wall.
+
+32 bottles of beer on the wall, 32 bottles of beer.
+Take one down and pass it around, 31 bottles of beer on the wall.
+
+31 bottles of beer on the wall, 31 bottles of beer.
+Take one down and pass it around, 30 bottles of beer on the wall.
+
+30 bottles of beer on the wall, 30 bottles of beer.
+Take one down and pass it around, 29 bottles of beer on the wall.
+
+29 bottles of beer on the wall, 29 bottles of beer.
+Take one down and pass it around, 28 bottles of beer on the wall.
+
+28 bottles of beer on the wall, 28 bottles of beer.
+Take one down and pass it around, 27 bottles of beer on the wall.
+
+27 bottles of beer on the wall, 27 bottles of beer.
+Take one down and pass it around, 26 bottles of beer on the wall.
+
+26 bottles of beer on the wall, 26 bottles of beer.
+Take one down and pass it around, 25 bottles of beer on the wall.
+
+25 bottles of beer on the wall, 25 bottles of beer.
+Take one down and pass it around, 24 bottles of beer on the wall.
+
+24 bottles of beer on the wall, 24 bottles of beer.
+Take one down and pass it around, 23 bottles of beer on the wall.
+
+23 bottles of beer on the wall, 23 bottles of beer.
+Take one down and pass it around, 22 bottles of beer on the wall.
+
+22 bottles of beer on the wall, 22 bottles of beer.
+Take one down and pass it around, 21 bottles of beer on the wall.
+
+21 bottles of beer on the wall, 21 bottles of beer.
+Take one down and pass it around, 20 bottles of beer on the wall.
+
+20 bottles of beer on the wall, 20 bottles of beer.
+Take one down and pass it around, 19 bottles of beer on the wall.
+
+19 bottles of beer on the wall, 19 bottles of beer.
+Take one down and pass it around, 18 bottles of beer on the wall.
+
+18 bottles of beer on the wall, 18 bottles of beer.
+Take one down and pass it around, 17 bottles of beer on the wall.
+
+17 bottles of beer on the wall, 17 bottles of beer.
+Take one down and pass it around, 16 bottles of beer on the wall.
+
+16 bottles of beer on the wall, 16 bottles of beer.
+Take one down and pass it around, 15 bottles of beer on the wall.
+
+15 bottles of beer on the wall, 15 bottles of beer.
+Take one down and pass it around, 14 bottles of beer on the wall.
+
+14 bottles of beer on the wall, 14 bottles of beer.
+Take one down and pass it around, 13 bottles of beer on the wall.
+
+13 bottles of beer on the wall, 13 bottles of beer.
+Take one down and pass it around, 12 bottles of beer on the wall.
+
+12 bottles of beer on the wall, 12 bottles of beer.
+Take one down and pass it around, 11 bottles of beer on the wall.
+
+11 bottles of beer on the wall, 11 bottles of beer.
+Take one down and pass it around, 10 bottles of beer on the wall.
+
+10 bottles of beer on the wall, 10 bottles of beer.
+Take one down and pass it around, 9 bottles of beer on the wall.
+
+9 bottles of beer on the wall, 9 bottles of beer.
+Take one down and pass it around, 8 bottles of beer on the wall.
+
+8 bottles of beer on the wall, 8 bottles of beer.
+Take one down and pass it around, 7 bottles of beer on the wall.
+
+7 bottles of beer on the wall, 7 bottles of beer.
+Take one down and pass it around, 6 bottles of beer on the wall.
+
+6 bottles of beer on the wall, 6 bottles of beer.
+Take one down and pass it around, 5 bottles of beer on the wall.
+
+5 bottles of beer on the wall, 5 bottles of beer.
+Take one down and pass it around, 4 bottles of beer on the wall.
+
+4 bottles of beer on the wall, 4 bottles of beer.
+Take one down and pass it around, 3 bottles of beer on the wall.
+
+3 bottles of beer on the wall, 3 bottles of beer.
+Take one down and pass it around, 2 bottles of beer on the wall.
+
+2 bottles of beer on the wall, 2 bottles of beer.
+Take one down and pass it around, 1 bottle of beer on the wall.
+
+1 bottle of beer on the wall, 1 bottle of beer.
+Take it down and pass it around, no more bottles of beer on the wall.
+
+No more bottles of beer on the wall, no more bottles of beer.
+Go to the store and buy some more, 99 bottles of beer on the wall.
+```
diff --git a/exercises/practice/beer-song/.meta/config.json b/exercises/practice/beer-song/.meta/config.json
new file mode 100644
index 00000000..5bb008be
--- /dev/null
+++ b/exercises/practice/beer-song/.meta/config.json
@@ -0,0 +1,18 @@
+{
+  "authors": [],
+  "files": {
+    "solution": [
+      "src/lib.cairo",
+      "Scarb.toml"
+    ],
+    "test": [
+      "src/tests.cairo"
+    ],
+    "example": [
+      ".meta/example.cairo"
+    ]
+  },
+  "blurb": "Produce the lyrics to that beloved classic, that field-trip favorite: 99 Bottles of Beer on the Wall.",
+  "source": "Learn to Program by Chris Pine",
+  "source_url": "https://pine.fm/LearnToProgram/?Chapter=06"
+}
diff --git a/exercises/practice/beer-song/.meta/example.cairo b/exercises/practice/beer-song/.meta/example.cairo
new file mode 100644
index 00000000..ae925d3a
--- /dev/null
+++ b/exercises/practice/beer-song/.meta/example.cairo
@@ -0,0 +1,47 @@
+pub fn verse(n: u32) -> ByteArray {
+    assert!(0 <= n && n <= 99, "Verse must be between 0 and 99");
+    if n == 0 {
+        return "No more bottles of beer on the wall, no more bottles of beer.\nGo to the store and buy some more, 99 bottles of beer on the wall.\n";
+    } else if n == 1 {
+        return "1 bottle of beer on the wall, 1 bottle of beer.\nTake it down and pass it around, no more bottles of beer on the wall.\n";
+    } else if n == 2 {
+        return "2 bottles of beer on the wall, 2 bottles of beer.\nTake one down and pass it around, 1 bottle of beer on the wall.\n";
+    } else if n <= 99 {
+        return format!(
+            "{n} bottles of beer on the wall, {n} bottles of beer.\nTake one down and pass it around, {} bottles of beer on the wall.\n",
+            n - 1
+        );
+    } else {
+        panic!()
+    }
+}
+
+
+pub fn verses(start: u32, take_count: u32) -> ByteArray {
+    assert!(0 <= start && start <= 99, "Start verse must be between 0 and 99");
+    assert!(0 <= take_count && take_count <= 99, "Count of bottles must be between 0 and 99");
+    assert!(take_count <= start, "Cannot take down more than {start} bottles");
+
+    let mut lyrics: ByteArray = "";
+
+    let mut n = start;
+    let end = start - take_count;
+    while n >= end {
+        lyrics.append(@verse(n));
+        if n == end {
+            break;
+        }
+        lyrics.append(@"\n");
+        n -= 1;
+    };
+
+    lyrics
+}
+
+pub fn song() -> ByteArray {
+    verses(99, 99)
+}
+
+#[cfg(test)]
+mod tests;
+
diff --git a/exercises/practice/beer-song/.meta/tests.toml b/exercises/practice/beer-song/.meta/tests.toml
new file mode 100644
index 00000000..306cf88f
--- /dev/null
+++ b/exercises/practice/beer-song/.meta/tests.toml
@@ -0,0 +1,34 @@
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
+
+[5a02fd08-d336-4607-8006-246fe6fa9fb0]
+description = "verse -> single verse -> first generic verse"
+
+[77299ca6-545e-4217-a9cc-606b342e0187]
+description = "verse -> single verse -> last generic verse"
+
+[102cbca0-b197-40fd-b548-e99609b06428]
+description = "verse -> single verse -> verse with 2 bottles"
+
+[b8ef9fce-960e-4d85-a0c9-980a04ec1972]
+description = "verse -> single verse -> verse with 1 bottle"
+
+[c59d4076-f671-4ee3-baaa-d4966801f90d]
+description = "verse -> single verse -> verse with 0 bottles"
+
+[7e17c794-402d-4ca6-8f96-4d8f6ee1ec7e]
+description = "lyrics -> multiple verses -> first two verses"
+
+[949868e7-67e8-43d3-9bb4-69277fe020fb]
+description = "lyrics -> multiple verses -> last three verses"
+
+[bc220626-126c-4e72-8df4-fddfc0c3e458]
+description = "lyrics -> multiple verses -> all verses"
diff --git a/exercises/practice/beer-song/Scarb.toml b/exercises/practice/beer-song/Scarb.toml
new file mode 100644
index 00000000..dd1c412b
--- /dev/null
+++ b/exercises/practice/beer-song/Scarb.toml
@@ -0,0 +1,4 @@
+[package]
+name = "beer_song"
+version = "0.1.0"
+edition = "2023_11"
diff --git a/exercises/practice/beer-song/src/lib.cairo b/exercises/practice/beer-song/src/lib.cairo
new file mode 100644
index 00000000..b3461d59
--- /dev/null
+++ b/exercises/practice/beer-song/src/lib.cairo
@@ -0,0 +1,15 @@
+pub fn verse(n: u32) -> ByteArray {
+    panic!("emit verse {n}")
+}
+
+pub fn verses(start: u32, take_count: u32) -> ByteArray {
+    panic!("sing {take_count} verses from {start}")
+}
+
+pub fn song() -> ByteArray {
+    panic!("sing the whole song")
+}
+
+#[cfg(test)]
+mod tests;
+
diff --git a/exercises/practice/beer-song/src/tests.cairo b/exercises/practice/beer-song/src/tests.cairo
new file mode 100644
index 00000000..1a345128
--- /dev/null
+++ b/exercises/practice/beer-song/src/tests.cairo
@@ -0,0 +1,63 @@
+#[test]
+fn verse_with_0_bottles() {
+    assert_eq!(
+        beer_song::verse(0),
+        "No more bottles of beer on the wall, no more bottles of beer.\nGo to the store and buy some more, 99 bottles of beer on the wall.\n"
+    );
+}
+
+#[test]
+fn verse_with_1_bottle() {
+    assert_eq!(
+        beer_song::verse(1),
+        "1 bottle of beer on the wall, 1 bottle of beer.\nTake it down and pass it around, no more bottles of beer on the wall.\n"
+    );
+}
+
+#[test]
+fn verse_with_2_bottles() {
+    assert_eq!(
+        beer_song::verse(2),
+        "2 bottles of beer on the wall, 2 bottles of beer.\nTake one down and pass it around, 1 bottle of beer on the wall.\n"
+    );
+}
+
+#[test]
+fn first_generic_verse() {
+    assert_eq!(
+        beer_song::verse(99),
+        "99 bottles of beer on the wall, 99 bottles of beer.\nTake one down and pass it around, 98 bottles of beer on the wall.\n"
+    );
+}
+
+#[test]
+fn last_generic_verse() {
+    assert_eq!(
+        beer_song::verse(3),
+        "3 bottles of beer on the wall, 3 bottles of beer.\nTake one down and pass it around, 2 bottles of beer on the wall.\n"
+    );
+}
+
+#[test]
+fn first_two_verses() {
+    assert_eq!(
+        beer_song::verses(99, 1),
+        "99 bottles of beer on the wall, 99 bottles of beer.\nTake one down and pass it around, 98 bottles of beer on the wall.\n\n98 bottles of beer on the wall, 98 bottles of beer.\nTake one down and pass it around, 97 bottles of beer on the wall.\n"
+    );
+}
+
+#[test]
+fn last_three_verses() {
+    assert_eq!(
+        beer_song::verses(2, 2),
+        "2 bottles of beer on the wall, 2 bottles of beer.\nTake one down and pass it around, 1 bottle of beer on the wall.\n\n1 bottle of beer on the wall, 1 bottle of beer.\nTake it down and pass it around, no more bottles of beer on the wall.\n\nNo more bottles of beer on the wall, no more bottles of beer.\nGo to the store and buy some more, 99 bottles of beer on the wall.\n"
+    );
+}
+
+#[test]
+fn all_verses() {
+    let expected =
+        "99 bottles of beer on the wall, 99 bottles of beer.\nTake one down and pass it around, 98 bottles of beer on the wall.\n\n98 bottles of beer on the wall, 98 bottles of beer.\nTake one down and pass it around, 97 bottles of beer on the wall.\n\n97 bottles of beer on the wall, 97 bottles of beer.\nTake one down and pass it around, 96 bottles of beer on the wall.\n\n96 bottles of beer on the wall, 96 bottles of beer.\nTake one down and pass it around, 95 bottles of beer on the wall.\n\n95 bottles of beer on the wall, 95 bottles of beer.\nTake one down and pass it around, 94 bottles of beer on the wall.\n\n94 bottles of beer on the wall, 94 bottles of beer.\nTake one down and pass it around, 93 bottles of beer on the wall.\n\n93 bottles of beer on the wall, 93 bottles of beer.\nTake one down and pass it around, 92 bottles of beer on the wall.\n\n92 bottles of beer on the wall, 92 bottles of beer.\nTake one down and pass it around, 91 bottles of beer on the wall.\n\n91 bottles of beer on the wall, 91 bottles of beer.\nTake one down and pass it around, 90 bottles of beer on the wall.\n\n90 bottles of beer on the wall, 90 bottles of beer.\nTake one down and pass it around, 89 bottles of beer on the wall.\n\n89 bottles of beer on the wall, 89 bottles of beer.\nTake one down and pass it around, 88 bottles of beer on the wall.\n\n88 bottles of beer on the wall, 88 bottles of beer.\nTake one down and pass it around, 87 bottles of beer on the wall.\n\n87 bottles of beer on the wall, 87 bottles of beer.\nTake one down and pass it around, 86 bottles of beer on the wall.\n\n86 bottles of beer on the wall, 86 bottles of beer.\nTake one down and pass it around, 85 bottles of beer on the wall.\n\n85 bottles of beer on the wall, 85 bottles of beer.\nTake one down and pass it around, 84 bottles of beer on the wall.\n\n84 bottles of beer on the wall, 84 bottles of beer.\nTake one down and pass it around, 83 bottles of beer on the wall.\n\n83 bottles of beer on the wall, 83 bottles of beer.\nTake one down and pass it around, 82 bottles of beer on the wall.\n\n82 bottles of beer on the wall, 82 bottles of beer.\nTake one down and pass it around, 81 bottles of beer on the wall.\n\n81 bottles of beer on the wall, 81 bottles of beer.\nTake one down and pass it around, 80 bottles of beer on the wall.\n\n80 bottles of beer on the wall, 80 bottles of beer.\nTake one down and pass it around, 79 bottles of beer on the wall.\n\n79 bottles of beer on the wall, 79 bottles of beer.\nTake one down and pass it around, 78 bottles of beer on the wall.\n\n78 bottles of beer on the wall, 78 bottles of beer.\nTake one down and pass it around, 77 bottles of beer on the wall.\n\n77 bottles of beer on the wall, 77 bottles of beer.\nTake one down and pass it around, 76 bottles of beer on the wall.\n\n76 bottles of beer on the wall, 76 bottles of beer.\nTake one down and pass it around, 75 bottles of beer on the wall.\n\n75 bottles of beer on the wall, 75 bottles of beer.\nTake one down and pass it around, 74 bottles of beer on the wall.\n\n74 bottles of beer on the wall, 74 bottles of beer.\nTake one down and pass it around, 73 bottles of beer on the wall.\n\n73 bottles of beer on the wall, 73 bottles of beer.\nTake one down and pass it around, 72 bottles of beer on the wall.\n\n72 bottles of beer on the wall, 72 bottles of beer.\nTake one down and pass it around, 71 bottles of beer on the wall.\n\n71 bottles of beer on the wall, 71 bottles of beer.\nTake one down and pass it around, 70 bottles of beer on the wall.\n\n70 bottles of beer on the wall, 70 bottles of beer.\nTake one down and pass it around, 69 bottles of beer on the wall.\n\n69 bottles of beer on the wall, 69 bottles of beer.\nTake one down and pass it around, 68 bottles of beer on the wall.\n\n68 bottles of beer on the wall, 68 bottles of beer.\nTake one down and pass it around, 67 bottles of beer on the wall.\n\n67 bottles of beer on the wall, 67 bottles of beer.\nTake one down and pass it around, 66 bottles of beer on the wall.\n\n66 bottles of beer on the wall, 66 bottles of beer.\nTake one down and pass it around, 65 bottles of beer on the wall.\n\n65 bottles of beer on the wall, 65 bottles of beer.\nTake one down and pass it around, 64 bottles of beer on the wall.\n\n64 bottles of beer on the wall, 64 bottles of beer.\nTake one down and pass it around, 63 bottles of beer on the wall.\n\n63 bottles of beer on the wall, 63 bottles of beer.\nTake one down and pass it around, 62 bottles of beer on the wall.\n\n62 bottles of beer on the wall, 62 bottles of beer.\nTake one down and pass it around, 61 bottles of beer on the wall.\n\n61 bottles of beer on the wall, 61 bottles of beer.\nTake one down and pass it around, 60 bottles of beer on the wall.\n\n60 bottles of beer on the wall, 60 bottles of beer.\nTake one down and pass it around, 59 bottles of beer on the wall.\n\n59 bottles of beer on the wall, 59 bottles of beer.\nTake one down and pass it around, 58 bottles of beer on the wall.\n\n58 bottles of beer on the wall, 58 bottles of beer.\nTake one down and pass it around, 57 bottles of beer on the wall.\n\n57 bottles of beer on the wall, 57 bottles of beer.\nTake one down and pass it around, 56 bottles of beer on the wall.\n\n56 bottles of beer on the wall, 56 bottles of beer.\nTake one down and pass it around, 55 bottles of beer on the wall.\n\n55 bottles of beer on the wall, 55 bottles of beer.\nTake one down and pass it around, 54 bottles of beer on the wall.\n\n54 bottles of beer on the wall, 54 bottles of beer.\nTake one down and pass it around, 53 bottles of beer on the wall.\n\n53 bottles of beer on the wall, 53 bottles of beer.\nTake one down and pass it around, 52 bottles of beer on the wall.\n\n52 bottles of beer on the wall, 52 bottles of beer.\nTake one down and pass it around, 51 bottles of beer on the wall.\n\n51 bottles of beer on the wall, 51 bottles of beer.\nTake one down and pass it around, 50 bottles of beer on the wall.\n\n50 bottles of beer on the wall, 50 bottles of beer.\nTake one down and pass it around, 49 bottles of beer on the wall.\n\n49 bottles of beer on the wall, 49 bottles of beer.\nTake one down and pass it around, 48 bottles of beer on the wall.\n\n48 bottles of beer on the wall, 48 bottles of beer.\nTake one down and pass it around, 47 bottles of beer on the wall.\n\n47 bottles of beer on the wall, 47 bottles of beer.\nTake one down and pass it around, 46 bottles of beer on the wall.\n\n46 bottles of beer on the wall, 46 bottles of beer.\nTake one down and pass it around, 45 bottles of beer on the wall.\n\n45 bottles of beer on the wall, 45 bottles of beer.\nTake one down and pass it around, 44 bottles of beer on the wall.\n\n44 bottles of beer on the wall, 44 bottles of beer.\nTake one down and pass it around, 43 bottles of beer on the wall.\n\n43 bottles of beer on the wall, 43 bottles of beer.\nTake one down and pass it around, 42 bottles of beer on the wall.\n\n42 bottles of beer on the wall, 42 bottles of beer.\nTake one down and pass it around, 41 bottles of beer on the wall.\n\n41 bottles of beer on the wall, 41 bottles of beer.\nTake one down and pass it around, 40 bottles of beer on the wall.\n\n40 bottles of beer on the wall, 40 bottles of beer.\nTake one down and pass it around, 39 bottles of beer on the wall.\n\n39 bottles of beer on the wall, 39 bottles of beer.\nTake one down and pass it around, 38 bottles of beer on the wall.\n\n38 bottles of beer on the wall, 38 bottles of beer.\nTake one down and pass it around, 37 bottles of beer on the wall.\n\n37 bottles of beer on the wall, 37 bottles of beer.\nTake one down and pass it around, 36 bottles of beer on the wall.\n\n36 bottles of beer on the wall, 36 bottles of beer.\nTake one down and pass it around, 35 bottles of beer on the wall.\n\n35 bottles of beer on the wall, 35 bottles of beer.\nTake one down and pass it around, 34 bottles of beer on the wall.\n\n34 bottles of beer on the wall, 34 bottles of beer.\nTake one down and pass it around, 33 bottles of beer on the wall.\n\n33 bottles of beer on the wall, 33 bottles of beer.\nTake one down and pass it around, 32 bottles of beer on the wall.\n\n32 bottles of beer on the wall, 32 bottles of beer.\nTake one down and pass it around, 31 bottles of beer on the wall.\n\n31 bottles of beer on the wall, 31 bottles of beer.\nTake one down and pass it around, 30 bottles of beer on the wall.\n\n30 bottles of beer on the wall, 30 bottles of beer.\nTake one down and pass it around, 29 bottles of beer on the wall.\n\n29 bottles of beer on the wall, 29 bottles of beer.\nTake one down and pass it around, 28 bottles of beer on the wall.\n\n28 bottles of beer on the wall, 28 bottles of beer.\nTake one down and pass it around, 27 bottles of beer on the wall.\n\n27 bottles of beer on the wall, 27 bottles of beer.\nTake one down and pass it around, 26 bottles of beer on the wall.\n\n26 bottles of beer on the wall, 26 bottles of beer.\nTake one down and pass it around, 25 bottles of beer on the wall.\n\n25 bottles of beer on the wall, 25 bottles of beer.\nTake one down and pass it around, 24 bottles of beer on the wall.\n\n24 bottles of beer on the wall, 24 bottles of beer.\nTake one down and pass it around, 23 bottles of beer on the wall.\n\n23 bottles of beer on the wall, 23 bottles of beer.\nTake one down and pass it around, 22 bottles of beer on the wall.\n\n22 bottles of beer on the wall, 22 bottles of beer.\nTake one down and pass it around, 21 bottles of beer on the wall.\n\n21 bottles of beer on the wall, 21 bottles of beer.\nTake one down and pass it around, 20 bottles of beer on the wall.\n\n20 bottles of beer on the wall, 20 bottles of beer.\nTake one down and pass it around, 19 bottles of beer on the wall.\n\n19 bottles of beer on the wall, 19 bottles of beer.\nTake one down and pass it around, 18 bottles of beer on the wall.\n\n18 bottles of beer on the wall, 18 bottles of beer.\nTake one down and pass it around, 17 bottles of beer on the wall.\n\n17 bottles of beer on the wall, 17 bottles of beer.\nTake one down and pass it around, 16 bottles of beer on the wall.\n\n16 bottles of beer on the wall, 16 bottles of beer.\nTake one down and pass it around, 15 bottles of beer on the wall.\n\n15 bottles of beer on the wall, 15 bottles of beer.\nTake one down and pass it around, 14 bottles of beer on the wall.\n\n14 bottles of beer on the wall, 14 bottles of beer.\nTake one down and pass it around, 13 bottles of beer on the wall.\n\n13 bottles of beer on the wall, 13 bottles of beer.\nTake one down and pass it around, 12 bottles of beer on the wall.\n\n12 bottles of beer on the wall, 12 bottles of beer.\nTake one down and pass it around, 11 bottles of beer on the wall.\n\n11 bottles of beer on the wall, 11 bottles of beer.\nTake one down and pass it around, 10 bottles of beer on the wall.\n\n10 bottles of beer on the wall, 10 bottles of beer.\nTake one down and pass it around, 9 bottles of beer on the wall.\n\n9 bottles of beer on the wall, 9 bottles of beer.\nTake one down and pass it around, 8 bottles of beer on the wall.\n\n8 bottles of beer on the wall, 8 bottles of beer.\nTake one down and pass it around, 7 bottles of beer on the wall.\n\n7 bottles of beer on the wall, 7 bottles of beer.\nTake one down and pass it around, 6 bottles of beer on the wall.\n\n6 bottles of beer on the wall, 6 bottles of beer.\nTake one down and pass it around, 5 bottles of beer on the wall.\n\n5 bottles of beer on the wall, 5 bottles of beer.\nTake one down and pass it around, 4 bottles of beer on the wall.\n\n4 bottles of beer on the wall, 4 bottles of beer.\nTake one down and pass it around, 3 bottles of beer on the wall.\n\n3 bottles of beer on the wall, 3 bottles of beer.\nTake one down and pass it around, 2 bottles of beer on the wall.\n\n2 bottles of beer on the wall, 2 bottles of beer.\nTake one down and pass it around, 1 bottle of beer on the wall.\n\n1 bottle of beer on the wall, 1 bottle of beer.\nTake it down and pass it around, no more bottles of beer on the wall.\n\nNo more bottles of beer on the wall, no more bottles of beer.\nGo to the store and buy some more, 99 bottles of beer on the wall.\n";
+    assert_eq!(beer_song::song(), expected);
+}
+