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77 0 77 1 77 2 77 3 77 4 77 5 77 6 77 7 77 8 77 9 78 0 78 1 78 2 78 3 78 4 78 5 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986

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