using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var numbers = Enumerable.Range(1, 20);

        var tlNos = numbers.TakeLast(10);

        var slNos = numbers.SkipLast(10);

        Console.WriteLine("SkipLast: ");

        foreach(var n in slNos) Console.Write($"{n},");

        Console.WriteLine("\n");

        Console.WriteLine("TakeLast: ");

        foreach(var n in tlNos) Console.Write($"{n},");

    }

}