public class Person {
    private String name;
    private Book book1;
    private Book book2;
    
    public Person(String name) {
        this.name = name;
    }
    
    public String getName() {
        return name;
    }
    
    public void buy(Book book) {
        if (book1 == null) {
            book1 = book;
        } else if (book2 == null) {
            book2 = book;
        } else {
            System.out.println("Cannot buy");
        }
    }
    
    public void show() {
        System.out.println(name + " bought: ");
        if (book1 != null) {
            book1.print();
        }
        if (book2 != null) {
            book2.print();
        }
    }
}