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55 8 55 9 56 0 56 1 56 2 56 3 56 4 56 5 56 6 56 7 56 8 1648 1647 1646 1645 1644 1643 1642 1641 1640 1639

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