B' U' D R2 U' F' B D' R2 B L2 B U2 F' D2 R2 F R

z2 //inspection
L F' L2' R' U' R' // cross
U y' R' U' R // 1st pair
y' U' R' U R U L' U' L // 2nd pair
y R U' R' y' R' U2' R // 3rd pair
U R U2' R' U2 R U' R' // 4th pair
U2' R U2' R2' F R F' R U2' R' // OLL(CP)