x2 // inspection
L U R' F R2 D' // cross
R' U R // 1st pair
U' L' U L U R U R' // 2nd pair
y' R U' R' U' R U' R' U R U' R' // 3rd pair
U y' R U R' U2' R U' R' U R U' R' // 4th pair
R U2' R2' U' R2 U' R2' U2' R // OLL
U' R' d' F R2 u R' U R U' R u' R2'