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18 43 18 44 18 45 18 46 18 47 18 48 18 49 18 50 18 51 18 52 18 53 1890 1889 1888 1887 1886 1885 1884 1883 1882 1881

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