package examples;

/**
    An example of storing the AKO hierarchy
    using classes.
 */
 class Mammal {
    private boolean hasHair = true;
}

 class Human extends Mammal2 {

    public static void main(String args[]) {
        System.out.println("Hello World!");

    }
}

 class Doggy extends Mammal2 {
    public static void main(String args[]) {
        System.out.println("Hello World!");

    }
}

 class Student extends Human {
    public static void main(String args[]) {
        System.out.println("Hello World!");

    }
}

 class Professor extends Human {
    public static void main(String args[]) {
        System.out.println("Hello World!");

    }
}