x2 z' // inspection
r U' r' U' // cross
x' R U' R' U' R U R' // 1st pair
y' R U R' U L L' L U L' // 2nd pair
R U' R' U' L' U' L // 3rd pair
U' R U' U' R' d R' U' R // 4th pair
U' R U R' U R U' B U' B' R' // OLL
U R U' R' U' R U R D R' U' R D' R' U U R' U // PLL