using System;

public class Program

{

    public static void Main()

    {

        string domain ="http://cpdulles.com";

        string url = "http://cpdulles.com/aboutus?q=1&a=2/";

        url = url.Insert(url.IndexOf(domain) + domain.Length, "/amp").TrimEnd('/');

        Console.WriteLine(url);

    }

}