y2 // inspection
R U' L2 F' L // cross
R U R' L U' L' // 1st pair
U R U' R' U R' U' R U L' U L // 2nd pair
R' U' R U2 R' U' R // 3rd pair
y' R' U2 R U' R B' R' B // 4th pair
U' R U R' U R U' R' F' U' F U R U2 R' // OLL
U R U R' (U' D) R2 U' R U' R' U R' U R2 D' U2'