using System;

public class Program

{

    public static void Main()

    {

        characterisvowelornot();

    }

    public static void characterisvowelornot()

    {

        char ch;

        ch = char.Parse(Console.ReadLine());

        bool isA = ch =='a';

        bool isE = ch == 'e' ;

        bool isI = ch == 'i' ;

        bool isO = ch == 'o';

        bool isU = ch == 'u';

        Console.WriteLine("isA "+  isA + " isE "+ isE +" isI "+isI + " isO "+ isO +" isU : " + isU);

        if(isA|| isE || isI || isO|| isU)

       //if(ch =='a'|| ch == 'e' || ch == 'i' || ch == 'o'|| ch == 'u')

        {

            Console.WriteLine(ch + " is a vowel");

        }

        else

        {

             Console.WriteLine(ch + " is a constant");

        }   

    }

}