U2 L2 B' F L2 U B' L' B L' U' R' F' R' D L F R U'

x // inspection
R' z' r' U' R z U' z // cross
U R U' R' U' z U R U' // 1st pair
U' R z' L // 2nd pair
U' R' U R U' U' R' U R // 3rd pair
U R U' R' U' (x y) U' R U R U' R' z' L // 4th pair
U' U' R' U' R' x U R U' x' U R // OLL
U' U' R2 u R' U R' U' R u' R2 (y z) U' R U R // PLL