Action on the cell
A-H Fill with this color (1-8)
I
Fill with next color : 0->1->2->..->last_color
J Fill
with previous color : last_color->...->2->1->0
K Like I
with a cycle : 0->..->last_color->0
L Like
J with a cycle : last_color->..->0->last_color
M Like K
without 0 : 1->..->last_color->1
N Like
L without 0 : last_color->..->1->last_color
O Cancel
any previous color change in this turn
o Erase
all previous mark
P Fill
with the neighbors' majority color
V Empty
cell
R Select
a random color (0 to last_color)
W-Z Set a mark (1-4)
w-z Reset a mark(1-4)