L2 R2 U B2 L2 D R2 B2 R2 D B2 R' F' D' L2 U R2 B2 L D B
Solution
z2
//
inspection
U' D' r U' x' F U' F' U' R2 D
//
cross
R' U R
//
1st pair
d R' U R2 U R'
//
2nd pair
L' U L U' U' L' U L
//
3rd pair
y U U' U' R U R' y' U' R' U R
//
4th pair
U' U' U' F2 R U' R' U' R U R' F' R U R' U' R' F R F2 U
//
ZBLL