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19 6 19 7 19 8 19 9 20 0 20 1 20 2 20 3 20 4 20 5 20 6 20 7 20 8 20 9 21 0 21 1 1915 1914 1913 1912 1911 1910 1909 1908 1907 1906 1905 1904 1903 1902 1901

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