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91 00 91 01 91 02 91 03 91 04 91 05 91 06 91 07 91 08 91 09 91 10 8789 8788 8787 8786 8785 8784 8783 8782 8781 8780

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