z2 y // inspection
u' x R U' r' // cross
y U' R U2' R' U y R U' R' // 1st pair
U y R' U' R U R' U' R U R' U' R // 2nd pair
U' y' U' U' R' U' R U' y' y' R' U' R // 3rd pair
U2' y' y' R' U2' R U2' R' U R // 4th pair
U' R U R' U U2' R' R U U R U2' R' F R U R' U' F' // OLL
U2' y' R R U R' U U' U R' U' R U' R R U' D R' U R u' // PLL