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20 27 5 20 27 6 20 27 7 20 27 8 20 27 9 20 28 0 20 28 1 20 28 2 20 28 3 20 28 4 20 28 5 26471 26470 26469 26468 26467 26466 26465 26464 26463 26462

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