using System;

namespace ProgramCall

{

    class BaseClass

    {

        public int FindSum(int x, int y)

        {

            return(x+y);

        }

        protected void Print(int x, int y)

        {

            Console.WriteLine("First Number:"+x);

            Console.WriteLine("Second Number:"+y);

        }

    }

    class DerivedClass:BaseClass

    {

        public void Print3Numbers(int x,int y,int z)

        {

            Print(x,y);

            Console.WriteLine("Print Third Number:"+z);

        }

    }

  public class MainClass

    {

    public static void Main(string[] args)

        {

            DerivedClass instance = new DerivedClass();

        instance.Print3Numbers(30, 40, 50);

        int sum = instance.FindSum(30, 40);

        Console.WriteLine("Sum : " + sum);

        }

    }

}