using System;

public class Program

{

    public static void Main()

    {

        //Natalia Vargas

        string letter;

        Console.WriteLine("Please write a letter and I'll tell you if it's vowel or consonant");

        letter = Console.ReadLine();

        switch (letter)

        {

            case "a":

            case "A":

            case "e":

            case "E":

            case "i":   

            case "I":   

            case "o":   

            case "O":   

            case "u":   

            case "U":   

                Console.WriteLine("The letter " + letter + " is vowel");

                break;

            case "b":

            case "B":

            case "c":

            case "C":

            case "d":   

            case "D":   

            case "f":   

            case "F":   

            case "g":   

            case "G":   

            case "h":

            case "H":

            case "j":

            case "J":

            case "k":   

            case "K":   

            case "l":   

            case "L":   

            case "m":   

            case "M":   

            case "n":

            case "N":

            case "ñ":

            case "Ñ":

            case "p":   

            case "P":   

            case "q":   

            case "Q":   

            case "r":   

            case "R":

            case "s":

            case "S":

            case "t":

            case "T":

            case "v":   

            case "V":   

            case "w":   

            case "W":   

            case "x":   

            case "X":   

            case "y":

            case "Y":

            case "z":

            case "Z":

                Console.WriteLine("The letter " + letter + " is consonat");

                break;

            default:

                Console.WriteLine("That's not a letter");

                break;

        }

    }

}