x'
//
inspection
F2 U R L' B'
//
cross
y' x2' U' R U R U' R U R' U' R U
//
1st pair
x' x' R x' U' R U
//
2nd pair
x U' R' U l' U R U'
//
3rd pair
x (R U R' U')3
//
4th pair
z' U2 f (R U R' U')2 f'
//
OLL
U x' r U' R' U L' U2 R U' R' U2 R U' U'
//
PLL