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71 77 71 78 71 79 71 80 71 81 71 82 71 83 71 84 71 85 71 86 71 87 8223 8222 8221 8220 8219 8218 8217 8216 8215 8214

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