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40 8 40 9 41 0 41 1 41 2 41 3 41 4 41 5 41 6 41 7 41 8 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972

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