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13 90 9 13 91 0 13 91 1 13 91 2 13 91 3 13 91 4 13 91 5 13 91 6 13 91 7 13 91 8 13 91 9 31995 31994 31993 31992 31991 31990 31989 31988 31987 31986

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