They could learn a great deal by not skipping straight to the outer map, it's true. But that still leaves the question of what exactly the password might be and for all his earlier boasting this really isn't anything at all like his work on cracking the Enigma code. That had at least been working in a language he'd known, with an alphabet loosely analogous to the English alphabet, neither of which can be said here. But given that he doesn't mean to try anything until they're at least agreed that it probably isn't going to backfire horribly.

"Mmm, too similar, I'd imagine. But it could be 'enter'."

Which has the added bonus of also being a valid computer keystroke, for all that he can't imagine that Praxian society will have had anything even remotely similar to the computers that he and Helen are more familiar. But the idea is sound at the very least, even if neither of them is doing much more than theorizing at the moment.

(But that is, of course, part of the thrill of it, although it's nothing compared to the triumph that will inevitably come of getting this figured out properly.)