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30 Days of Code - Day 28

To view solutions, see the file regex.py in your text editor.

Day 28: RegEx, Patterns, and Intro to Databases

Task:

Consider a database table, Emails, which has the attributes First Name and Email ID. Given N rows of data simulating the Emails table, print an alphabetically-ordered list of people whose email address ends in @gmail.com.

Input Format

The first line contains an integer, N, total number of rows in the table. Each of the N subsequent lines contains 2 space-separated strings denoting a person's first name and email ID, respectively.

Constraints

  • 2 <= N <= 30
  • Each of the first names consists of lower case letters [a-z] only.
  • Each of the email IDs consists of lower case letters [a-z], @ and . only.
  • The length of the first name is no longer than 20.
  • The length of the email ID is no longer than 50.

Output Format

Print an alphabetically-ordered list of first names for every user with a gmail account. Each name must be printed on a new line.

Sample Input

6
riya riya@gmail.com
julia julia@julia.me
julia sjulia@gmail.com
julia julia@gmail.com
samantha samantha@gmail.com
tanya tanya@gmail.com

Sample Output

julia
julia
riya
samantha
tanya

Solution:

In regex.py.

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