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14 16 14 17 14 18 14 19 14 20 14 21 14 22 14 23 14 24 14 25 14 26 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988

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