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