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86 8 86 9 87 0 87 1 87 2 87 3 87 4 87 5 87 6 87 7 87 8 1885 1884 1883 1882 1881 1880 1879 1878 1877 1876

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