package model;

public class B extends A {

...

public void G(A a) {

FA();

}

...

}

package extension;

import model.B;

public class C extends B {

...

public void G(A a) {

this.c = a.y;

}

...

}

package extension;

import model.B;

public class C extends B {

...

public void G(A a) {

this.c = a.z;

}

...

}

package model;

public class B extends A {

...

public void G(A a) {

this.y = a.s;

}

...

}

package extension;

import model.B;

public class C extends B {

...

private void FC() {

FB();

}

...

}

package model;

public class B extends A {

...

public void G(A a) {

int cont = a.r;

}

...

}

package model;

public class B extends A {

...

public void G(A a) {

this.r = a.s;

}

...

}

package extension;

import model.B;

public class C extends B {

...

private void FC() {

FA();

}

...

}

package model;

public class B extends A  {

...

public void G(A a) {

this.z = a.y;

}

...

}

package model;
public class A {
	...
	
	void FA() {
		r = s = x = y = z;	
	}
}