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51 0 51 1 51 2 51 3 51 4 51 5 51 6 51 7 51 8 51 9 52 0 1917 1916 1915 1914 1913 1912 1911 1910 1909 1908

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