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27 3 27 4 27 5 27 6 27 7 27 8 27 9 28 0 28 1 28 2 28 3 28 4 28 5 28 6 28 7 28 8 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993

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