using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Dictionary<string, string> openWith =  new Dictionary<string, string>();

        openWith.Add("txt", "notepad.exe");

        openWith.Add("bmp", "paint.exe");

        openWith.Add("dib", "paint.exe");

        openWith.Add("rtf", "wordpad.exe");

        if(openWith.ContainsKey("abc"))

           {

               Console.WriteLine("Fail");

           }

         else

           {

               Console.WriteLine("Pass");

           }

    }

}