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12 77 12 78 12 79 12 80 12 81 12 82 12 83 12 84 12 85 12 86 12 87 1890 1889 1888 1887 1886 1885 1884 1883 1882 1881

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