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;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AtCoderTest
{
    public class Program
    {
        public static void Main(string[] args)
        {
            string s = Console.ReadLine();
            string[] boin = new string[] { "a", "e", "i", "o", "u" };

            if(boin.Contains(s))
            {
                Console.WriteLine("vowel");
            }

            else
            {
                Console.WriteLine("consonant");
            }
        }
    }
}