>>2874090A page I bookmarked from here a long time ago was updated to mention 3 letter strings doing certain things.
IDK what the fuck is below U yet, and idk if I wanna find out. But it's also interesting as hell.
Most really suck though, so it's a lot of wasted time.
Could prolly automate it and dig through later, or look at examples, but the discovery is kinda satisfying and allows me to test each combo to get a better idea.