This might have been done before, but I thought I’d give it a try:
Poster 1 posts a name, first and middle, using the first two letters of the alphabet (A and B if anyone wasn’t sure). Poster 2 uses the middle from Poster 1 as a first and a middle starting with C and posts a name. Poster 3 uses the middle from Poster 2, etc.
Yes, this does mean that only girls’ names work in this game! Unless someone feels like switching it up with a unisex choice. Depending on how it goes I might start another for boys.