 And then they take that gibberish, transmit it, and when it comes into a U-boat, the U-boat takes it in, puts it back through the machine, and out comes all of the operations, code names, sailing dates, whatever. That's cryptography. Saw the movie and read the book, and I understand what you're saying. Well, keep in mind it was a book about a guy. A lot of what they had, the technical details, were flat out wrong.