class Quizful {
    private static int count = 0;
    private final int id = ++count;

    private void print() {
        System.out.println(id);
    }

    public void printOther(Quizful other) {
        other.print();
    }
    public static void main(String[] args) {
        Quizful one = new Quizful();
        Quizful two = new Quizful();
        two.printOther(one);
    }    
}