public class Hoved {
    public static void main(String[] args) {
        CounterMonitor m = new CounterMonitor();
        Thread t1 = new Thread(new IncrementCounter(m));
        Thread t2 = new Thread(new IncrementCounter(m));
        Thread t3 = new Thread(new DecrementCounter(m));
        Thread t4 = new Thread(new DecrementCounter(m));
        
        t1.start();
        t2.start();
        t3.start();
        t4.start();
        
    }
}