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61 43 5 61 43 6 61 43 7 61 43 8 61 43 9 61 44 0 61 44 1 61 44 2 61 44 3 61 44 4 61 44 5 61 44 6 61 44 7 61 44 8 61 44 9 61 45 0 61 45 1 61 45 2 61 45 3 61 45 4 61 45 5 61 45 6 61 45 7 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971 1970

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