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88 9 89 0 89 1 89 2 89 3 89 4 89 5 89 6 89 7 89 8 89 9 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993

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