using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("quiubo");

        string characterUser = " ";

        bool validation = false;

        Console.WriteLine("Ingrese la letra a evaluar");

        characterUser = Console.ReadLine();

        if ( characterUser == "a")

        {

            validation = true;

        }

        else if ( characterUser == "e")

        {

            validation = true;

        }

        else if ( characterUser == "i")

        {

            validation = true;

        }

        else if ( characterUser == "o")

        {

            validation = true;

        }

        else if ( characterUser == "u")

        {

            validation = true;

        }

         if ( validation )

         {

             Console.WriteLine(" la letra" + characterUser + " es una vocal");

         }

        else

        {

            Console.WriteLine(" La letra " + characterUser+ " es una consonante");

        }

        Console.WriteLine(" vemosky");

    }

}