Cube faces
FACE & SLICE ROTATION COMMANDS
F - Front
S - Standing (rotate according to Front Face's orientation)
B - Back
L - Left
M - Middle (rotate according to Left Face's orientation)
R - Right
U - Up
E - Equator (rotate according to Up Face's orientation)
D - Down
ENTIRE CUBE ROTATION COMMANDS
X - Rotate entire cube according to Right Face's orientation
Y - Rotate entire cube according to Up Face's orientation
Z - Rotate entire cube according to Front Face's orientation