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13 13 13 14 13 15 13 16 13 17 13 18 13 19 13 20 13 21 13 22 13 23 1901 1900 1899 1898 1897 1896 1895 1894 1893 1892

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