class Animal {
    public abstract class bark();
}

class Tiger extends Animal {
    public class bark() {

    }
}
class Lion extends Animal {
    public class bark() {

    }
}

public class Bouncer {
    public void barkAnimal(Animal animal) {
        if (animal instanceof Tiger) {
            System.out.println("어흥");
        } else if (animal instanceof Lion) {
            System.out.println("으르렁");
        }
    }

    public static void main(String[] args) {
        Tiger tiger = new Tiger();
        Lion lion = new Lion();

        Bouncer bouncer= new Bouncer();
        bouncer.barkAnimal(tiger);
        bouncer.barkAnimal(lion);
    }
}