z y2 // inspection
U R F R L2' // partial cross / 1st pair
(U' D) R' U R u' // 2nd pair
r U' r' // XXcross
r U' r' U2' r U r' // 3rd pair
y R' U2 R U' R' U R // 4th pair
U L' l U R' F2 R U L' U (L r) R' // OLL
U' U r' D' F r U' r' F' D r2 U r' U' r' F r F'