z2 y
//edges RNOI QBCS XALE
//corners PAXC BSRC
M2 F' R2 F' M' F M R2 F M2 //UF-BD-RB-RF-FL
R2 S U S' D' M' U' M D R2 //UF-LD-UB-UR-RD
[L' U L U', M'] [L' u L : [E, L2]]
[D : [U', R' D R]]
[U' R' D R : [U, R D' R']]
[R F' R' U' : [R D R', U2]]
[R D R', U']
R' U' F' R U R' U' R' F R2 U' R' U' R U R' U R