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37 71 37 72 37 73 37 74 37 75 37 76 37 77 37 78 37 79 37 80 37 81 37881 37880 37879 37878 37877 37876 37875 37874 37873 37872

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