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21 02 21 03 21 04 21 05 21 06 21 07 21 08 21 09 21 10 21 11 21 12 21 13 21 14 21 15 21 16 21 17 13657 13656 13655 13654 13653 13652 13651 13650 13649 13648 13647 13646 13645 13644 13643

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