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81 8 81 9 82 0 82 1 82 2 82 3 82 4 82 5 82 6 82 7 82 8 82 9 83 0 83 1 83 2 83 3 1701 1700 1699 1698 1697 1696 1695 1694 1693 1692 1691 1690 1689 1688 1687

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