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86 4 86 5 86 6 86 7 86 8 86 9 87 0 87 1 87 2 87 3 87 4 1915 1914 1913 1912 1911 1910 1909 1908 1907 1906

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