y2 x // inspection
U2 L2' l U' x' y U // cross
U' R U x' U' R U // 1st pair
x' R' U' R U l' U R' U' // 2nd pair
l' U' R U l' U R' U' // 3rd pair
l' U R2 U' x' R U' R' U // 4th pair
z' U' U' R U R' U R U' U' R' // OLL
R U R' F' R U R' U' R' F R2 U' R' // PLL