z' // inspection
U2 x' U' L U // cross
x2 (l' R') l' U R' U' x' U R2 U' // 1st pair
x R' U R2 U' R' F' R' F // 2nd pair
U' R' U l' U R U' // 3rd pair
x2' R x U R U' x' R U' R' (U z') // 4th pair (OLL skip)
U' L' U l' y (R l) U R' U' R2 (U D) R' // PLL alg.garron