using System;

public class Program

{

    public static void Main()

    {

        B b = new B(10);  

    }

    class A  

    {  

        int i;  

        public A(int j)  

        {  

            i = j;  

            Console.WriteLine("Base");  

        }  

    }  

    class B : A  

    {  

        public B(int j) : base(j)  

        {  

            Console.WriteLine("Derived");  

        }   

    }  

}