..............................
..............................
..............................
.............OOO..............
...........O...O...O..........
.....OO...O.....O.O.O.........
....O...O......OO....O........
....O...O............O........
.....O.OOO...OO...O.O.........
......O...OOO......O..........
..............................
..............................
..............................
..............................