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59 1 59 2 59 3 59 4 59 5 59 6 59 7 59 8 59 9 60 0 60 1 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983

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