z2 // inspection
D' L' D' R' F R L' // cross
y' R U R' U R U' R2' // 1st pair
U' R y U' R U R' // 2nd pair
y U U R U' R' U R' U' R // 3rd pair
U' R U' R' d R' U' R // 4th pair
U R' F R U R U' R2' F' R2 U' R' U R U R' // OLL
F R U' R' U' R U R' F' R U R' U' R' F R F' U' U'