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 C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
class UOIAUAI {
    static void Main() {
        string input = Console.ReadLine();

        char[] vowel = { 'a', 'e', 'i', 'o', 'u' };

        if (input.IndexOfAny(vowel) == 0) {
            Console.WriteLine("vowel");
        } else {
            Console.WriteLine("consonant");
        }
    }
}