// Parent class
class A {
    void showA() {
        System.out.println("This is class A");
    }
}

// Child class of A
class B extends A {
    void showB() {
        System.out.println("This is class B");
    }
}

// Child class of B (multilevel inheritance)
class C extends B {
    void showC() {
        System.out.println("This is class C");
    }
}

// Main class
public class InheritanceDemo {
    public static void main(String[] args) {
        C obj = new C();

        obj.showA(); // inherited from class A
        obj.showB(); // inherited from class B
        obj.showC(); // own method of class C
    }
}