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15 91 15 92 15 93 15 94 15 95 15 96 15 97 15 98 15 99 16 00 16 01 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985

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