**Scramble:** D2 F2 L2 B U2 B’ R2 B’ L2 F’ D’ L’ B R F D R’ F2 L D’

**Solution:** B D B U2 R U’ F’ U R U’ R’ U F U F2 L2 R B2 R’ B L2 B’ R2 B L2 B’

**Explanation**

*Pseudo-2x3x3:* B D B U2 R

*Switch and F2L-1:* R’ B2 R’ L2 F U’

*3E4C:* U’ F’ U

*Skeleton:* B D B U2 R U’ F’ U2 * F’ L2 R B2 R

*Block-commutator for L3C:* * = U’ R U’ R’ U F U F’

*Unfortunately those L3C in 19 only give one move cancellation. I put* R2 B L2 B’ R2 B L2 B’ *at the end.*