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54 8 54 9 55 0 55 1 55 2 55 3 55 4 55 5 55 6 55 7 55 8 55 9 56 0 56 1 56 2 56 3 1675 1674 1673 1672 1671 1670 1669 1668 1667 1666 1665 1664 1663 1662 1661

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