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49 4 49 5 49 6 49 7 49 8 49 9 50 0 50 1 50 2 50 3 50 4 50 5 50 6 50 7 50 8 50 9 1892 1891 1890 1889 1888 1887 1886 1885 1884 1883 1882 1881 1880 1879 1878

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