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51 3 51 4 51 5 51 6 51 7 51 8 51 9 52 0 52 1 52 2 52 3 52 4 52 5 52 6 52 7 52 8 1909 1908 1907 1906 1905 1904 1903 1902 1901 1900 1899 1898 1897 1896 1895

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