The Popular goat latin interview question

goat_latin.rb

#!/usr/bin/env ruby

sentence = ['This','is','goat','latin']
vowel = ['a', 'e', 'i', 'o', 'u']
result = []
sentence.each_with_index do |word, idx|
  aaa = "ma" + "a" * (idx + 1)
  if vowel.include?(word[0])
    result << word + aaa
  else
    result << word[1..-1] + word[0] + aaa
  end
end

puts result.join(' ')