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13 41 13 42 13 43 13 44 13 45 13 46 13 47 13 48 13 49 13 50 13 51 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971

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