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10 79 10 80 10 81 10 82 10 83 10 84 10 85 10 86 10 87 10 88 10 89 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985

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