public class inherit_methods {
    public static void main(String[] args) {
	B b = new B();
	b.print1();
	b.print2();
    }
}

class A {
    public int x=1;
    public A() { print1(); print2(); /* print3(); */}
    public void print1() { System.out.println(x+0); }
    public void print2() { System.out.println(x+1); }
}

class B extends A {
    public B() { print1(); print2(); print3(); }
    public void print2() { System.out.println(x+2); }
    public void print3() { System.out.println(x+3); }
}

/* Note: how to use A's implementation of print2? */