x' y' // inspection
U' R2 D R' F' u' // cross
R U R' // 1st pair
y' R U R' U2 R U' R' // 2nd pair
L U L' y' U' L' U L // 3rd pair
R U' R' U' R U R' U R' F R F' // 4th pair
U' U' R U R' U R U' R' U' R' F R F' // OLL
U' R U' R' U' R U R D R' U' R D' R' U2 R' // PLL