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71 78 71 79 71 80 71 81 71 82 71 83 71 84 71 85 71 86 71 87 71 88 8215 8214 8213 8212 8211 8210 8209 8208 8207 8206

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