using System;

public class Program

{

    public void disp()

    {

        Console.WriteLine("base");

    }

    public class derived:base

    {

        public void disp()

        {

            Console.WriteLine("derived");

        }

    }

}

    public class hide

    {

        public static void Main()

        {

            derived d=new derived();

            d.disp();

    }

}