[ninjamayo]

Can't resist, I will add https://en.wikipedia.org/wiki/Answer_set_programming programming on this.

Q. How many Answerset programmers does it take to change a lightbulb? A. {1}, {1,2}, {1,2,3}, {2,1}, {2,1,3}, {2,3,1}

[sp332]

... {3,1}, {1,3}