public static void Main()
Console.WriteLine("What period are you in?");
myYear = Convert.ToInt16(Console.ReadLine());
Console.WriteLine("you can only answer numbers");
Console.WriteLine("starts 9.10 ends 10:00");
Console.WriteLine("starts 10.20 ends 11:20");
Console.WriteLine("starts 11.50 ends 12:40");
Console.WriteLine("i have no idea,sorry, try again later");