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22 8 22 9 23 0 23 1 23 2 23 3 23 4 23 5 23 6 23 7 23 8 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985

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