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55 6 55 7 55 8 55 9 56 0 56 1 56 2 56 3 56 4 56 5 56 6 1690 1689 1688 1687 1686 1685 1684 1683 1682 1681

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