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18 45 18 46 18 47 18 48 18 49 18 50 18 51 18 52 18 53 18 54 18 55 1900 1899 1898 1897 1896 1895 1894 1893 1892 1891

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