

what are these smap groups I found on Google Messages?
so i just came across these message groups on my Google Message app (i dont use it and almost never check it), and it seems like a bunch of foreign numbers (i guess latvian or idk) and mine is hungarian so it doesnt fit the pattern, and it seems like if I typed the text like "let me continue" or "i choose option" and then a random string. i havent gotten a notification of these and these chats seem to be empty, but idk what to do with them. I got 4 of them in the last 6 to 8 or so months.
i am a bit concerned, i dont recall doing anything really, but it feels off. how could have i typed these texts if i never opened these, or did it type these without me?
thank y'all for any advice, im really curious what are these.