y // inspection
R D R U' r U' x' D // cross
U' R U R' U2' R U R' d' U' R U R' // 1st pair
d' U' U' y U' R U R' U2' L' U' L // 2nd pair
U' R' U' R U' R' U' R2 // 3rd pair
U' R' d R' U' R // 4th pair
U r U2' R' U' R U' r' // OLL
U U' R' U R' d' R' F' R2 U' R' U R' F R F U'