y x
//
inspection
U2' r2' F' r
//
partial cross
U2 L U' L'
//
1st pair
R u' R u
//
Xcross
U' d' R U R' y' U R' U' R
//
2nd pair
y' R' U R U' R' U' R
//
3rd pair
y' R' U2' R
//
4th pair
(R' U' R U' U R' U R)
U R' F R F'R' F R F' R U R' U' R U R' U
//
OLLCP