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