class A {
  static int w = 1;
  private static int x = 2;
  public static int y = 3;
  protected static int z = 4;

  public static void main (String[] argv)
  {
    System.out.println (" w = " + w);
    System.out.println (" x = " + x); 
    System.out.println (" y = " + y);
    System.out.println (" z = " + z);
  }

}

class B extends A {
  public static void main (String[] argv)
  {
    System.out.println (" w = " + w);
    System.out.println (" x = " + x);  // Compiler error.
    System.out.println (" y = " + y);
    System.out.println (" z = " + z);
  }
}

class C {
  public static void main (String[] argv)
  {
    System.out.println (" w = " + A.w);
    System.out.println (" x = " + A.x); // Compiler error.
    System.out.println (" y = " + A.y);
    System.out.println (" z = " + A.z);
  }
}