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72 0 72 1 72 2 72 3 72 4 72 5 72 6 72 7 72 8 72 9 73 0 2110 2109 2108 2107 2106 2105 2104 2103 2102 2101

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