User blog comment:Ikosarakt1/Explicit ruleset for trees up to psi(psi I(0))/@comment-1605058-20130901131214/@comment-1605058-20130901204750

To be honest, I have no idea. I'm not familiar with collapsing functions, and function comparision is too complicated for me. If I took my time maybe I'd get an answer, but now I can't.