y2 x' // inspection
r R (U' D) (r' L') // cross
L' U L D (U' D) // 1st pair
R U' U' R' U R U' R' // 2nd pair
d' U' R U' R' // 3rd pair
U U R' U' R U' R' U' R // 4th pair
U' R' R U' R U' U' R2' U' R2 U' R2' U' U' R // OLL
U' F R U' R' U' R U R' F' R U R' U' l' U R U'