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30 2 30 3 30 4 30 5 30 6 30 7 30 8 30 9 31 0 31 1 31 2 31 3 31 4 31 5 31 6 31 7 1919 1918 1917 1916 1915 1914 1913 1912 1911 1910 1909 1908 1907 1906 1905

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