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13 05 13 06 13 07 13 08 13 09 13 10 13 11 13 12 13 13 13 14 13 15 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988

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