I think 16 is a "hacker's dozen"
@MrsMouse hacker's dozen is 0-indexed so you get one more than you expected no matter the number
@joeyh @MrsMouse Good point!  is a hacker's dozen
@joeyh @MrsMouse ah, the good old hangman's dilemma indexing
@joeyh I dunno. I'm on the fencepost about this problem.
Octodon is a nice general purpose instance.