y2 x' // inspection
u' U R U' U' z2 R U R' U // cross
z' U2' R U R' z U' R U // 1st pair
z' y R' U2' R U' R' U R // 2nd pair
R U' U' R' U' U' z U' R U // 3rd pair
z' y' U' U' U R U' R' R U R' U' R' U R U' U' R' U2' R // 4th pair
U R' U' R U' R' U2' R // OLL
U R' U' R y' z U' U' r U' R U R' U r' U2' R // PLL