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13 89 1 13 89 2 13 89 3 13 89 4 13 89 5 13 89 6 13 89 7 13 89 8 13 89 9 13 90 0 13 90 1 31998 31997 31996 31995 31994 31993 31992 31991 31990 31989

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