class Runner1 implements  Runnable {
    @Override
    public void  run() {
        for (int i=0;i<10;++i)
            System.out.println(" Runner1 " +i );
    }
}
class Runner2 implements Runnable {
    @Override
    public void  run() {
        for (int i=0; i< 10;++i)
            System.out.println(" Runner2 " +i );
    }
}

public class main{
    public static void main(String[] args) {

       Thread t1 = new Thread(new Runner1());
       Thread t2 = new Thread(new Runner2());

       t1.start();
       t2.start();
    }
}