class Test {

  public static void main(String[] args) {
    C c = new C();
    c.display(); //90 - don't do it!!

  }
}

class A {

  int x = 90;
}

class B extends A {

  void display() {
    System.out.println(super.x);
  }
}

class C extends B {

  int x = 80;

}