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66 2 66 3 66 4 66 5 66 6 66 7 66 8 66 9 67 0 67 1 67 2 3913 3912 3911 3910 3909 3908 3907 3906 3905 3904

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