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81 94 81 95 81 96 81 97 81 98 81 99 82 00 82 01 82 02 82 03 82 04 7212 7211 7210 7209 7208 7207 7206 7205 7204 7203

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