// CSE 142 Lecture 19
// Encapsulation, Inheritance
// Our goal is to figure out the output from the main method.
// We start by drawing the inheritance tree and filling out our
// inheritance table.

public class InheritanceMystery {
	public static void main(String[] args) {
		C[] elements = {new A(), new B(), new C(), new D()};
		for (int i = 0; i < elements.length; i++) {
		    System.out.println(elements[i]);
		    elements[i].method1();
		    System.out.println();
		    elements[i].method2();
		    System.out.println();
		    System.out.println();
		}
	}
}

class A extends B {
    public void method2() {
        System.out.print("a 2 ");
        method1();
    }
}

class B extends C {
    public String toString() {
        return "b";
    }

    public void method2() {
        System.out.print("b 2 ");
    }
}

class C {
    public String toString() {
        return "c";
    }

    public void method1() {
        System.out.print("c 1 ");
    }

    public void method2() {
        System.out.print("c 2 ");
    }
}

class D extends B {
    public void method1() {
        System.out.print("d 1 ");
        method2();
    }
}