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17 98 17 99 18 00 18 01 18 02 18 03 18 04 18 05 18 06 18 07 18 08 1900 1899 1898 1897 1896 1895 1894 1893 1892 1891

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