....................
....................
....................
....................
xxxxxxxxxxxxxxxxxxxx
x.....x..x===x+....x
x.x.......====x....x
x..o..x...x====x...x
x.xxoxxxx.xx====x..x
x.o...o..x..x===x..x
x.oo.x...x...x.oo..x
xxx..ooox...oo..o..x
x.o..x..x....x.ox..x
x...ox..x.......o..x
x..x....x....x..x..x
xxxxxxxxxxxxxxxxxxxx
....................
....................
....................
....................
