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77 03 77 04 77 05 77 06 77 07 77 08 77 09 77 10 77 11 77 12 77 13 7704 7703 7702 7701 7700 7699 7698 7697 7696 7695

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