Permute last layer corners (9 moves)
You need only one algorithm to do this in one step, and believe it or not, we've already covered this for the final first layer corner step.
The A permutation (three cycle, 9 moves):
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You might need it's inverse as well.
Again, if you have accidentally broken the 2x2 block you might end up with 4 corners out of position, in which case there are two more cases to deal with.
- (11 moves) The H permutation. It looks like four edges are wrong, but when moving U2 it will become a situation with four corners to solve.
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- (15) The E permutation. Here you can be sure four corners are wrong.
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