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36 97 36 98 36 99 37 00 37 01 37 02 37 03 37 04 37 05 37 06 37 07 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982

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