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60 5 60 6 60 7 60 8 60 9 61 0 61 1 61 2 61 3 61 4 61 5 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985

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