 And if it's online, you can print it out. But you can also, if you find errors in it, you will, then you can make slight modifications in the years in the future. And if you take every subject in which you don't have to change it that much. I mean, there are subjects, current events that would have to be updated all the time. But there would be other subjects like English literature, you know, algebra, basic biology, where they don't change much over decades.