U2 B2 L2 D' B2 F2 R2 D2 U2 R2 F' R B2 F2 U L2 R2 F U' F
Solution
y' x'
//
inspection
U' U' R' z U x' u'
//
cross
R' U R R U R'
//
1st pair
z R' x U R U' z'
//
2nd pair
U' U' R U' R'
//
3rd pair
y U' U' R U U R' U' R U R'
//
4th pair
U' U' U' r' U' R U' R' U' U' r
//
OLL(CP)