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