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49 4 49 5 49 6 49 7 49 8 49 9 50 0 50 1 50 2 50 3 50 4 1906 1905 1904 1903 1902 1901 1900 1899 1898 1897

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