I was thinking that St.peter would have to be peter (NAME1) but then that wouldn't be enough to be it's own block. I'm guessing the split boxes [ ][ ][ ] are characters and the long [\t] are for numbers.
I think the eight square boxes mean "exactly 8 characters", and the long rectangles mean "up to 8 characters".
You can tell them apart (sometimes) because "exactly 8 characters" will match if those 8 characters are re-used by someone else with a longer than 8 character password.
And the layout emphasizes the re-use, which is also shown by color coding.
