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45 4 45 5 45 6 45 7 45 8 45 9 46 0 46 1 46 2 46 3 46 4 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982

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