This is fun:

@mus runs a #mastodon *nstance at oulipo.social with a constraint:

Writing #toots, no 1 should, umm... you can't... hmm, how should I put it?

Thing is, this character, don't put it in your toot!

Want a hint? Take this: *

More about it:

https://motherboard.vice.com/en_us/article/its-like-tweeting-but-you-cant-use-the-letter-e