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16 96 16 97 16 98 16 99 17 00 17 01 17 02 17 03 17 04 17 05 17 06 17 07 17 08 17 09 17 10 17 11 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975

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