R'U2R2 - UR'URU2 - B'R'B
r' U' r U' R' U R U' R' U R r' U r
FU(RU'R'U)(RU'R'F')
(R'U'RU'R'U)(F'UFR)
(RBR')(LUL'U')(RB'R')
[x'](RU'R'F')(RUR'U'FU)
R' F R U l' U' l [y'] R U' R'
(L'B'L)(R'U'RU)(L'BL)
R' F R U R' U' F' U R
(RUR')[y'](R'U'R)d(LU2L')
(RUR'U') (R'FRF')
F - RUR'U' - F'
RU - RB'R'B - U'R'
*y2* RUR'U' [x] D' - R'UR - E'