y2 x
//
inspection
U2 L2' l U' (x' y) U
//
cross
U' R U x' U' R U
//
1st pair
x' R' U' R U l' U R' U'
//
2nd pair
l' U' R U l' U R' U'
//
3rd pair
l' U R2 U' x' R U' R' U
//
4th pair
z' U' U' R U R' U R U' U' R'
//
OLL
R U R' F' R U R' U' R' F R2 U' R'
//
PLL