Helga's mom brought her to her first Karate competition.  Noting that the organizers seemed a little shorthanded she approached the table.  "Good morning," she said to the Director, "you look a little shorthanded.  Anything I can do to help?"   "Well it just so happens we're short a fighter for the under 90 kg division," the director replied.  "Sorry," Helga's mom said, "I don't know a thing about Karate."  "That's OK" said the director.   "We need referees, too."