Though it could save 2-3 minutes of run, if you're lucky enough.

YOLO code typing (for example, entering a code on a padlock at the very beginning of the game without going to the computer) is not allowed. The exceptions are code 5247 in Chapter 2 and code 279_ in Chapter 2.

What about code _7_9 in mental hospital in Chapter 6? Two digits is always the same.