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59 5 59 6 59 7 59 8 59 9 60 0 60 1 60 2 60 3 60 4 60 5 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980

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