Hi...

I recently got a hold of a Square-1 puzzle and have been trying to solve it.
I can get to the point where it's done, but two edges on one side are
swapped. How do I swap them back? Is this a parity problem? Every move I
have that swaps edges does TWO pairs are a time, so I can't get there with
what I have. Or can I? Any help would be appreciated.

-Aaron