Problem:
Score : 100 points

Problem Statement

Given a lowercase English letter c, determine whether it is a vowel. Here, there are five vowels in the English alphabet: a, e, i, o and u.

Constraints

c is a lowercase English letter.

Input

The input is given from Standard Input in the following format:

c

Output

If c is a vowel, print vowel. Otherwise, print consonant.

Sample Input 1

a

Sample Output 1

vowel

Since a is a vowel, print vowel.

Sample Input 2

z

Sample Output 2

consonant

Sample Input 3

s

Sample Output 3

consonant

Solution in Ruby (2.3.3) (judge verdict: Wrong Answer)

s = gets.chomp

words  = ['dreamer', 'eraser', 'dream', 'erase']

words.permutation(4) do |arr|
  tmp_s = s.dup
  arr.each do |word|
    while tmp_s.include?(word)
      tmp_s.gsub!(word, '')
    end
  end
  if tmp_s == ''
    puts 'YES'
    exit
  end
end

puts 'NO'