z2
//
inspection
D2 R U l U L2
//
cross
U' R U' R' U R' U' R
//
1st pair
U R U R' y' U' L' U L L' U L
//
2nd pair
R U2' R' U F' U' F
//
3rd pair
y y' U U' R' U2 R U' R' U R
//
4th pair
U F' r U R' U' r' F R
//
OLL
y' F' U' F R2 u R' U R U' R u' R2'
//
PLL