Here I present my Lego Technic MOC combination lock safe. It has four eight letter word reels and can make 522 English words. You change the code using the hidden floor inside
LEGO IDEAS - Sheriff's Safe with Combination Lock
LEGO IDEAS - Sheriff's Safe with Combination Lock
How To Build A Working Lego Safe - with Real Combination Lock! - YouTube
How to make a LEGO Safe with Combination Lock - Easy Lego - YouTube