class Animal {
    public String name;
    public String species;
    public int age;
    Animal(){}
    public Animal(String name, String species, int id, int age) {
        this.name = name;
        this.species = species;
        this.age = age;
    }
    }

 class Lion extends Animal{
    Lion(){}
    Lion (String name, String species, int age){

}
 class Giraffe extends Animal{
    Giraffe(){}
    Giraffe(String name, String species int age),
   }
class JoyeLionChild extends Animal{
Lion(String name="Joye", int age=0, String species),
}
class FifiGiraffeChild extends Animal{
Giraffe(String name="Fifi", int age=0, String species),

public class Zoo {
    private ArrayList<Animal> animals = new ArrayList<>();

  public void addAnimal(Animal a)
  {
    animals.add(a);
}