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46 9 47 0 47 1 47 2 47 3 47 4 47 5 47 6 47 7 47 8 47 9 48 0 48 1 48 2 48 3 48 4 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971

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