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89 3 89 4 89 5 89 6 89 7 89 8 89 9 90 0 90 1 90 2 90 3 1889 1888 1887 1886 1885 1884 1883 1882 1881 1880

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