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71 7 71 8 71 9 72 0 72 1 72 2 72 3 72 4 72 5 72 6 72 7 72 8 72 9 73 0 73 1 73 2 1759 1758 1757 1756 1755 1754 1753 1752 1751 1750 1749 1748 1747 1746 1745

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