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73 19 73 20 73 21 73 22 73 23 73 24 73 25 73 26 73 27 73 28 73 29 8153 8152 8151 8150 8149 8148 8147 8146 8145 8144

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