class EvenOdd extends Thread
{   public EvenOdd(int first, int interval)
    {  i0 = first;  delay = interval; }

    public void run()
    { try
	{  for (int i=i0; i < 100; i += 2 )
	   {   System.out.println(i);
	       sleep(delay);
	   }
	}  catch (InterruptedException e)
	   {   return;  }
    }

    private int i0;
    private int delay;
}

class ThreadTest
{   public static void main(String[] args)
           throws InterruptedException
    {    EvenOdd ot = new EvenOdd(1, 20);
	 EvenOdd et = new EvenOdd(0, 30);
	 ot.start();
	 et.start();
	 et.join();
	 et.join();
         System.out.println("Main thread done");

    }
}