Earlier quoted context omitted.
GPT4 solves this problem In any combination easily. What do so many posters seem to claim to have stumped it?
Because I did stump it, not claim to. Used GPT-4 near when it was released, fed it variations on the problem for about an hour. I found it to be a fascinating exercise because it was teaching be the difference between knowledge (training set) and intelligence (generalization).
Easily solved it everytime On allofus.ai using basic reflection and mixture of experts.