using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        int[] arr = new int[] {1,2,3,4,5,6,7,8};

        Range rng = new Range(3,8);

        Console.WriteLine(string.Join(", ", arr[3..4]));

        Console.WriteLine(string.Join(", ", arr[3..5]));

        Console.WriteLine(string.Join(", ", arr[3..6]));

        Console.WriteLine(string.Join(", ", arr[3..7]));

        Console.WriteLine(string.Join(", ", arr[3..^1]));

    }

}