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15 71 15 72 15 73 15 74 15 75 15 76 15 77 15 78 15 79 15 80 15 81 15 82 15 83 15 84 15 85 15 86 15 87 15 88 15 89 15 90 15 91 15 92 15 93 15 94 15 95 15 96 15 97 15 98 15 99 16 00 16 01 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980

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