using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("What period do you have lunch");

    int period;

    string sans= Console.ReadLine();

    if(int.TryParse(  sans, out period))

        Console.WriteLine("Cool…that’s my lunch period too!");

    else

        Console.WriteLine("Please enter an appropriate answer");  

    }

}