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

namespace ABC
{
  public class Program
  {
    public static void Main(string[] args)
    {
      char c;
      string s = Console.ReadLine();
      c = Convert.ToChar(s);
      char[] voins = {'a', 'i', 'u', 'e', 'o'};
      int n = Array.IndexOf(voins, c);
      if(n==-1)
      {
        Console.WriteLine("consonant");
      }
      else
      {
        Console.WriteLine("vowel");
      }
    }
  }
}