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36 32 36 33 36 34 36 35 36 36 36 37 36 38 36 39 36 40 36 41 36 42 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989

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