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79 5 79 6 79 7 79 8 79 9 80 0 80 1 80 2 80 3 80 4 80 5 1891 1890 1889 1888 1887 1886 1885 1884 1883 1882

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