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10 54 10 55 10 56 10 57 10 58 10 59 10 60 10 61 10 62 10 63 10 64 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971

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