R2 U L2 D2 L2 U2 B2 D B2 U' B2 L' R' F L B' R D2 L D
z y // inspection
U' R' u' F D' R // cross
U R' U' R2 U R' // 1st pair
U z U' R' U z' R' U' R // 2nd pair
y' R U' R' U' z U' R' U // 3rd pair
z' R U R' U' U' R U R' // 4th pair
R U' U' R' U' R U L' U R' U' L U' R U' R' // ZBLL