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64 3 64 4 64 5 64 6 64 7 64 8 64 9 65 0 65 1 65 2 65 3 65 4 65 5 65 6 65 7 65 8 65 9 66 0 66 1 66 2 66 3 66 4 66 5 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972

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