using System;

public class Program

{

    public static void Main()

    {

        char sex ;

        do{

            Console.Write("Input Sex [M/F] : ");

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

        }while(sex != 'M' && sex != 'F');

        if(sex == 'M')

        {

            Console.WriteLine("You are Male");

        }

        else

        {

            Console.WriteLine("You are Feale");

        }

    }

}