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36 51 36 52 36 53 36 54 36 55 36 56 36 57 36 58 36 59 36 60 36 61 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985

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