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70 9 71 0 71 1 71 2 71 3 71 4 71 5 71 6 71 7 71 8 71 9 72 0 72 1 72 2 72 3 72 4 1911 1910 1909 1908 1907 1906 1905 1904 1903 1902 1901 1900 1899 1898 1897

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