import java.util.ArrayList;
public class Animal {
	protected String name;
	protected String noise;
	protected int age;
	
	public Animal(String name, int age) {
		this.name = name;
		this.age = age;
		this.noise = "Huh?";
	}
	
    /** Returns this animal's age. */
    public int getAge() {
        return this.age;
    }

    public static void main(String[] args) {
        ArrayList<Animal> animals = new ArrayList<>();
        animals.add(new Cat("Garfield", 4));
        animals.add(new Dog("Biscuit", 2));
    }
}

class Cat extends Animal {
	public Cat(String name, int age){
        super(name, age);
        super.noise = "Meow!";
    }
}

class Dog extends Animal {
	public Dog(String name, int age) {
		super(name, age);
		noise = "Woof!";
	}
}