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88 0 88 1 88 2 88 3 88 4 88 5 88 6 88 7 88 8 88 9 89 0 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988

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