advanced
........\Adult.class
........\Adult.java
........\Arm.class
........\Arm.java
........\Cat.class
........\Cat.java
........\Child.class
........\Child.java
........\Dog.class
........\Dog.java
........\Family.class
........\Family.java
........\Head.class
........\Head.java
........\Human.class
........\Human.java
........\Leg.class
........\Leg.java
........\Limb.class
........\Limb.java
........\Mammal.class
........\Mammal.java
........\MovieRating.class
........\MovieRating.java
........\Rabbit.class
........\Rabbit.java