using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        DisplaySlots("HH:mm", System.TimeSpan.FromMinutes(60), 10);

    }

     static void DisplaySlots(string format, TimeSpan slotLength, int slots)

        {

            DateTime time = DateTime.Today.Add(System.TimeSpan.FromHours(9));

            for (int i = 0; i < slots; i++)

            {

                Console.WriteLine(time.ToString(format));

                time = time + slotLength;

            }

        }

}