..oo................oo..
.o21o..............o12o.
.o212o............o112o.
o22122o..........o21122o
o21112o..........o11123o
o21bb23o........o21bb23o
o21bb22o........o21bb23o
o21bb223o......o221bb23o
o22bb223o......o221bb23o
o221bb23o......o21bb223o
o221bb223o....o221bb223o
o221bb223o....o221bb223o
o221bbb23o....o22bbb233o
o222bbb233o..o222bbb233o
.o22bbb223o..o222bbb33o.
.o222bbb23o..o22bbb233o.
..o22bbb23o..o22bbb33o..
..o222bb333oo222bb333o..
...o23bbb33oP22bbb33o...
....o33bb33oo22bb33o....