z2 // inspection
F' R' U R' U' R D R' F D2' U2 r' U r // xcross (FR)
U' L U' L' // 2nd pair (BL)
U' L' U L U2 L F' L' F // 3rd pair (FL)
U' R' U R // 4th pair (BR)
(U') (R U R' U R U2' R') F (R U R' U') F' // OLL 41
(U2) R' U' R U D' R2 U R' U R U' R U' R2' D (U2'