O.
80 60
0 0
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
................................................................................
.................................OOO...........OOO..............................
................................O...O.........O...O.............................
...............................OO....O.......O....OO............................
..............................O.O.OO.OO.....OO.OO.O.O...........................
.............................OO.O....O.OO.OO.O....O.OO..........................
............................O....O...O..O.O..O...O....O.........................
........................................O.O.....................................
............................OO.......OO.O.O.OO.......OO.........................
........................................O.O.....................................
..................................OOO.........OOO...............................
..................................O...O.........O...............................
..................................O.O....OOO....................................
........................................O..O....OO..............................
...........................................O....................................
.......................................O...O....................................
.......................................O...O....................................
...........................................O....................................
........................................O.O.....................................
................................................................................
................................................................................
