using System;

​

public class Program

{

    public static void Main(string[] args)

    {

        var tuple = new Tuple<int, int, int, int, int, int, int, Tuple<int, int>>(2, 3, 5, 7, 11, 13, 17,  Tuple.Create<int, int>(18, 19));

​

        Console.WriteLine(tuple.Item3);

        Console.WriteLine(tuple.Rest.Item1);

        Console.WriteLine(tuple.Rest.Item2);

    }

}