Last layer, rotate 3 edges

Question

Up until a few months ago I was happily solving my 4x4x4 cube, then, thanks to a medical thing, I've lost/forgotten a few algorithms. I've got all of them back except 1, rotating the last 3 edges.

edit: this isn't a parity issue, it's the same as the 3x3x3 case (sorry I wasn't clear)

What I remember is this:

1. Everything is oriented correctly and the corners are positioned correctly.
2. The cube is oriented so the correctly positioned edge is facing front and the last layer is on top.
3. I never rotate the back face.

I've found a quite a few algorithms that can solve it, but not for those criteria. I've not found one that has the correct edge facing front, and when I rotate the algorithm I'll need to rotate the back face.

Any ideas?

Answer 1

OP confirmed it was a regular 3x3x3 case, where three of the edges have to rotate around without orienting them. In that case, the following algorithm could be used with the solved fourth edge at the top-front:

R' U' R U' R' U2 R U R U R' U R U2 R' U'

These are the PLL Ua and Ub perms (depending on whether you have to rotate them around clockwise or counterclockwise), so you can find a lot of alternative algorithms accomplishing the same result here.