using System;

public class Program

{

    public static void Main()

    {

        /*int n ;

        do

        {

            Console.WriteLine("Please select Menu!");

            Console.WriteLine("1. Class A");

            Console.WriteLine("1. Class B");

            Console.WriteLine("1. Class C");

            Console.WriteLine("1. Class D");

        n = int.Parse(Console.ReadLine());

        } while (n<0||n>5);

        Console.WriteLine("Welcome to class ")*/

        char sex;

        do

        {

            Console.WriteLine("Enter sex [M/F]");

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

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

        //}while(sex != 'F'|| sex != 'M'); จริง หรือ จริง ลูปยาว

        //}while(sex != 'F'&& sex != 'M'); จริง และ จริง ลูปจบ

        if(sex != 'F'){

            Console.WriteLine("You are Female");

        }

        else{

            Console.WriteLine("You are Male");

        }

    }

}