using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var names = new LinkedList<string>();  

        names.AddLast("Sonoo");

        names.AddLast("Sonoo Jaiswal");  

        names.AddLast("Aabb");

        names.AddLast("Ankit");  

        names.AddLast("Peter");  

        names.AddLast("Irfan");  

        names.AddLast("Ankit");

        LinkedListNode<String> node=names.Find("Peter");  

        names.AddBefore(node, "John");         

        names.AddAfter(node, "Lucy");

        foreach( var name in names)

        {

            Console.WriteLine(name);

        }

    }

}