abstract class Book { String title; String author;

Book(String title, String author) {
    this.title = title;
    this.author = author;
}

abstract void display();

}

class MyBook extends Book { int price;

MyBook(String title, String author, int price) {
    super(title, author);
    this.price = price;
}

void display() {
    System.out.println("Title: " + title);
    System.out.println("Author: " + author);
    System.out.println("Price: " + price);
}

}