using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("OUTPUT");

        char abc = Convert.ToChar(Console.ReadLine());

        char a = Char.ToLower(abc);

        switch (a){

            case 'a':

        Console.WriteLine("it is a vowel");

         break;

            case 'e':

        Console.WriteLine("it is a vowel");

                break;

            case 'i':

        Console.WriteLine("it is a vowel");

        break;

            case 'o':

            Console.WriteLine("it is a vowel");

                break;

            case 'u':

                Console.WriteLine("it is a vowel");

                break;

            default:

                Console.WriteLine("it is a consonent");

    break;  }}}