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71 40 71 41 71 42 71 43 71 44 71 45 71 46 71 47 71 48 71 49 71 50 8218 8217 8216 8215 8214 8213 8212 8211 8210 8209

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