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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 2190 2189 2188 2187 2186 2185 2184 2183 2182 2181

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