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69 7 69 8 69 9 70 0 70 1 70 2 70 3 70 4 70 5 70 6 70 7 1892 1891 1890 1889 1888 1887 1886 1885 1884 1883

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