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27 8 27 9 28 0 28 1 28 2 28 3 28 4 28 5 28 6 28 7 28 8 28 9 29 0 29 1 29 2 29 3 1486 1485 1484 1483 1482 1481 1480 1479 1478 1477 1476 1475 1474 1473 1472

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