Description: Replace all vowel to exclamation mark in the sentence. aeiouAEIOU is vowel.
Examples replace("Hi!") === "H!!" replace("!Hi! Hi!") === "!H!! H!!" replace("aeiou") === "!!!!!" replace("ABCDE") === "!BCD!"
def replace(s)
s.tr("aeiouAEIOU", "!")
end
def replace(s)
s.gsub(/([aeiou])/i, '!')
end