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13 11 13 12 13 13 13 14 13 15 13 16 13 17 13 18 13 19 13 20 13 21 1893 1892 1891 1890 1889 1888 1887 1886 1885 1884

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