z y // inspection
U2' r' U' R B' R2' D2 // cross
U R' U' R U' R' U R // 1st pair
D R U' R' u' // 2nd pair
U' R U R' U' y' R U' R' U' R U R' U' R U' R' // 3rd pair
y U' R U' R' // 4th pair
U' R U R' U R' F R F' R U2' R' // OLL
U2' R U R' F' R U R' U' R' F R2 U' R' U' // PLL