Two questions about the Ab perm. What is the most common Ab perm? Apparently, no one uses my Ab perm which is x' R U' R D2 R' U R D2 R2. I'm probably not changing it since I can sub-1 this one (and I can't sub-1 a lot of my PLLs so can't complain haha), but I'm just curious. Also, looking at that algorithm, its structure is a setup move (R2), a commutator, and the undo to the setup move, right? and then the beginning just cancels out part of the setup move? I'm just asking because I'm starting 3-style for 3BLD and I'm learning commutators right now and I have been thinking about some of my PLLs in terms of commutators and stuff, and the A perm is probably the best example.