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12 27 12 28 12 29 12 30 12 31 12 32 12 33 12 34 12 35 12 36 12 37 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986

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