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15 98 15 99 16 00 16 01 16 02 16 03 16 04 16 05 16 06 16 07 16 08 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971

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