public class Main {
    public static void main(String[] args) {
        t t1 = new t(1);
        t t2 = new t(2);
        t1.start();
        t2.start();
 }
}
class t extends  Thread {
    int id;
    public t(int _id) {
        id = _id;
    }
    @Override
    public void run() {
        for(int i = 0; i < 10; i++) {
            System.out.println("Thread " + id +  " " + i);
        }
    }
}