............ooo...............
.........ooobbbooo............
........obbbbbbbbbo...........
.......obbaaaawwbbbo..........
......oaaaaaaaabbbbbo.........
.....obbawwaaaaabbbbbooooo....
.....obbawwabbbbbwwbbobbbbo...
....obbbabbbbbbbbwwbbcobbbbo..
....obbbbbbbwbbbbbbbbcobbwwco.
....obbbbbbbbbbbbccwwcoccccco.
...oobbbbcccccccccccccwcccccco
..oabooccccoooooccccooccccccco
.oaaaaaoooo21223oooocooooccoo.
obbwbbbbbbo21223o..oo2233oo...
obbbbbbbbco21223o...o2233o....
obbboooocco21223o...o2233o....
.ooo2233ooo21223o...o2233o....
...o2333o.o21223o...o2233o....
...o233o..o21223o....o233o....
...o233o..o2222Po....o233o....
...o233o..o22233o....o233o....
...o333o..o223333o...o333o....