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17 43 17 44 17 45 17 46 17 47 17 48 17 49 17 50 17 51 17 52 17 53 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971

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