“So here it is. You punch in twelve numbers. No more, no less. To make it interesting, there's no limit on the integers between the hyphens. Thus the code may be twelve numbers long, or it may be twelve million; it just has to have eleven hyphens in it. And then you push Enter. If you are wrong, the machine will shout STRIKE ONE. If you are wrong again, the machine will shout STRIKE TWO. If you are wrong a third time, the machine will figure out that someone who doesn't know is trying to guess his way in, and it will shout ACCESS DENIED and arbitrarily assign twelve new numbers that only it knows and that only another computer can figure out in about 135 work hours.”