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12 72 12 73 12 74 12 75 12 76 12 77 12 78 12 79 12 80 12 81 12 82 1892 1891 1890 1889 1888 1887 1886 1885 1884 1883

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