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58 3 58 4 58 5 58 6 58 7 58 8 58 9 59 0 59 1 59 2 59 3 59 4 59 5 59 6 59 7 59 8 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987

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