x2 y // inspection
U R' r D U' x' D // Xcross
U2 R U2' R2' U' U R d' U' U y' R U' R' // 1st pair
y U U R' U' R U' R' U' R // 2nd pair
U y' U' f f' R' U' R L' U L // 3rd pair
U R' U2' R y U2' R U2' R' U U R U' R' // 4th pair
U2' U r U R' U R U' R' U R U2' r' // OLL
y' y' L U2' L' U' U' r U' r' U' L U L F L2' U