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72 2 72 3 72 4 72 5 72 6 72 7 72 8 72 9 73 0 73 1 73 2 73 3 73 4 73 5 73 6 73 7 1748 1747 1746 1745 1744 1743 1742 1741 1740 1739 1738 1737 1736 1735 1734

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