using System;

​

class sample

{

  public int i;

  public void display() 

  {

  Console.Write(i);

  }

} 

class sample1 : sample 

{

  public int j;

  public void display1() 

  {

    Console.Write("{1}{0}",i,j);

  }

} 

public class Program

{

  public static void Main(string[] args)

  {

    sample obj = new sample();

    obj.i = 1;

    obj.display();

    sample1 obj1 = new sample1();

    obj1.j = 2;

    obj1.display1();

    Console.ReadLine();

  }

}