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17 97 17 98 17 99 18 00 18 01 18 02 18 03 18 04 18 05 18 06 18 07 1890 1889 1888 1887 1886 1885 1884 1883 1882 1881

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