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47 5 47 6 47 7 47 8 47 9 48 0 48 1 48 2 48 3 48 4 48 5 48 6 48 7 48 8 48 9 49 0 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971 1970 1969

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