class mythread implements Runnable
{
   String id;
   public mythread(String s) { id=s; }
   public void run()
    { for (int i=0;i<10000;i++)
	{
          System.out.print("I am ");
          System.out.println("thread "+id);
        }
    } // run
}

public class threads0
{
   public static void main(String[] args)
    { try {
	mythread mt1 = new mythread("A");
	mythread mt2 = new mythread("B");
	Thread t1 = new Thread(mt1);
	Thread t2 = new Thread(mt2);
	t1.start();
	t2.start();
	t1.join();
	t2.join();
      } catch (InterruptedException ie) {System.exit(1);}
    }// main
}