Posting things with words in addition to 140 symbols is odd and unfamiliar. And no fifth symbol is difficult, but fun.

Cat is licking chair. Lick lick lick lick. Stop. Lick lick lick lick. Stop. Lick lick lick lick.

Oulipo.social (Mark II)

Mastodon is a "FOSS" social sharing hub. A multi-host substitution for capitalistic platforms, it avoids risking a particular company monopolizing your communication. Pick a host that you trust — you can still talk with all hosts running Mastadon. Any individual can run a Mastodon instantiation and join in this social hub in a jiffy.