class CrearThread2 {

    public static void main(String args[]) {
	Thread t1 = new Thread(new Interna1());
	Thread t2 = new Thread(new Interna2());

	t1.start();
	t2.start();
	try {
	    t1.join();
	    t2.join();
	}
	catch (InterruptedException ie) { }
    }
    
}