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25 6 25 7 25 8 25 9 26 0 26 1 26 2 26 3 26 4 26 5 26 6 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983

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