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81 2 81 3 81 4 81 5 81 6 81 7 81 8 81 9 82 0 82 1 82 2 1887 1886 1885 1884 1883 1882 1881 1880 1879 1878

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