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56 8 56 9 57 0 57 1 57 2 57 3 57 4 57 5 57 6 57 7 57 8 1646 1645 1644 1643 1642 1641 1640 1639 1638 1637

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