using System;

  public class Program

{

class A

{  protected string text; 

 public A(string text) 

 {  this.text = text;  }

 public void Print() 

 {  Console.WriteLine(text);  } }

class B: A 

{ public B(string text): base(text) 

 {  }

public void ChangeText(string newText)

{

  base.text = newText; }  }  

​

  public static void Main(string[] args)

  {   A a = new A("Tova e izrechenie");  

    a.Print();

    B b = new B("Tova e izrechenie B");

    b.Print();

    b.ChangeText("Izrechenieto b be promeneno");

    b.Print(); }  }

​