code: def determineProtocol(fname):
      
      f=open(fname,'rb')
      raw=f.read(5000) #it should be in the first 5k of the file
      f.close()
      protoComment="unknown"
      if b"SWHLab4[" in raw:
          protoComment=raw.split(b"SWHLab4[")[1].split(b"]",1)[0]
      elif b"SWH[" in raw:
          protoComment=raw.split(b"SWH[")[1].split(b"]",1)[0]
      else:
          protoComment="?"
      if not type(protoComment) is str:
          protoComment=protoComment.decode("utf-8")
      return protoComment
docs: determine the comment cooked in the protocol.