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46 2 46 3 46 4 46 5 46 6 46 7 46 8 46 9 47 0 47 1 47 2 1891 1890 1889 1888 1887 1886 1885 1884 1883 1882

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