//
// A CORRECT SOLUTION
//

class A { 
    public int a;
    public A(int i) { a = i;}
}

class B extends A { 
    public int b;
    public B(int i, int j) {super(i); b = j;}
}

class C extends B { 
    public int c;
    public C(int i, int j, int k) {super(i,j); c = k;}
}

public class EqualsTest {
    public static void main(String[] args) {
	A a1 = new A(1);
	B b1 = new B(1,1);
	C c1 = new C(1,1,1);
	
	System.out.println("a1.equals(b1) = " + a1.equals(b1));
	System.out.println("a1.equals(c1) = " + a1.equals(c1));
	System.out.println("b1.equals(a1) = " + b1.equals(a1));
	System.out.println("b1.equals(c1) = " + b1.equals(c1));
	System.out.println("c1.equals(a1) = " + c1.equals(a1));
	System.out.println("c1.equals(b1) = " + c1.equals(b1));

	System.out.println("a1.equals(a1) = " + a1.equals(a1));
	System.out.println("b1.equals(b1) = " + b1.equals(b1));
	System.out.println("c1.equals(c1) = " + c1.equals(c1));
    }
}