// INHERIT0
// The following code is an example of a hierarchy 
// that classes might form.

// Here are the classes:
class A {}
class B extends A{}
class C extends A{}
class D extends B{}

// Here is the Class Hierarchy:
//
//         A
//        / \
//       B   C
//       |
//       D
//
// Note how you write superclasses above subclasses.
// A superclass may have multiple subclasses,
// but each subclass may have only ONE superclass.

public class inherit0 {
    public static void main(String[] args) {
    }
}