java

public class A { public A() { System.out.println("A"); }

public void one()
{
    System.out.println("one of A");
}

public void two()
{
    System.out.println("two of A");
    this.one();
}

public  void four()
{
    System.out.println ("four of A");
    this.two();
}

} //end of class A

public class B extends A { public B() { System.out.println("B"); }

public void one()
{
    System.out.println("one of B");
}

public void two()
{
    System.out.println("two of B");
}

public void three()
{
    System.out.println("three of B");
    super.two();
}

} //end of class B

public class C extends B { public void four() { System.out.println ("four of C"); } } //end of class C

public class Test { public static void main (String [] args) { // כאן יופיעו הפקודות שבסעיפים להלן } }