..................oo..........
..................oaoo........
..................oaaaoo......
.................oooaaaaoo....
...............oo22oaaaaaaoo..
............ooo22222oaaaaaaaoo
......oooooo22111122oabbbbbbbo
...ooo22222211112223obbbbbbcoo
..o1211111111122233obbbbbccoo.
.o1111111111122233oobbbbcoo...
o2211111222222233oobbbccoo....
o222122222222233o.obccoo......
o2222P222223333o..ooo.........
o222222233333oo...............
.o2223333333o.................
..o333333ooo..................
...oo3ooo.....................
