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12 75 12 76 12 77 12 78 12 79 12 80 12 81 12 82 12 83 12 84 12 85 12 86 12 87 12 88 12 89 12 90 645 644 643 642 641 640 639 638 637 636 635 634 633 632 631

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