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56 3 56 4 56 5 56 6 56 7 56 8 56 9 57 0 57 1 57 2 57 3 57 4 57 5 57 6 57 7 57 8 1686 1685 1684 1683 1682 1681 1680 1679 1678 1677 1676 1675 1674 1673 1672

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