public class CTest {
  public static void main (String[] args) {
    
    A a = new A(1);
    System.out.println("a.a = " + a.a);
    
    B b = new B(2);
    System.out.println("b.b = " + b.b);
    System.out.println("b.a = " + b.a);
    System.out.println("b.c = " + b.c);
    System.out.println("b.s = " + b.s);
  }
}