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21 17 2 21 17 3 21 17 4 21 17 5 21 17 6 21 17 7 21 17 8 21 17 9 21 18 0 21 18 1 21 18 2 21 18 3 21 18 4 21 18 5 21 18 6 21 18 7 25487 25486 25485 25484 25483 25482 25481 25480 25479 25478 25477 25476 25475 25474 25473

= Free Coordinate    = Occupied(Single Region)     = Occupied (Var Region)     = Center of the grid