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30 0 30 1 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 1913 1912 1911 1910 1909 1908 1907 1906 1905 1904 1903 1902 1901 1900 1899

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