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)

# 英小文字 c が与えられるので、c が母音であるか判定してください。

# 英小文字を取得
word = gets.chomp

# 結果を格納する変数を宣言
result = String.new

# 英小文字が母音かどうか判定
case word
when "a" || "i" || "u" || "e" || "o"
  result = "vowel"
else
  result = "consonant"
end

# 結果を出力
puts result