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70 1 70 2 70 3 70 4 70 5 70 6 70 7 70 8 70 9 71 0 71 1 1907 1906 1905 1904 1903 1902 1901 1900 1899 1898

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