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87 9 88 0 88 1 88 2 88 3 88 4 88 5 88 6 88 7 88 8 88 9 1698 1697 1696 1695 1694 1693 1692 1691 1690 1689

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