using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("What lesson?");

        int myYear =0;

        myYear = Convert.ToInt16(Console.ReadLine());

        switch(myYear)

        {

            case 1:

                Console.WriteLine("starts at 09:10 ends 10:10");

                break;

            case 2:

                Console.WriteLine("starts at 10:20 ends 11:20");

                break;

            case 3:

                Console.WriteLine("starts at 11:50 ends 12:40");

                break;

            case 4:

                Console.WriteLine("starts at 12:50 ends 13:50");

                break;

            case 5:

                Console.WriteLine("starts at 14:30 ends 15:25");

                break;

            default:

                Console.WriteLine("I have no idea, sorry, try later, computer says NO");

                break;

    }

}

}