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37 1 37 2 37 3 37 4 37 5 37 6 37 7 37 8 37 9 38 0 38 1 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982

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