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67 0 67 1 67 2 67 3 67 4 67 5 67 6 67 7 67 8 67 9 68 0 1649 1648 1647 1646 1645 1644 1643 1642 1641 1640

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