def fisbHexErrsToStr(hexErrs):
  """
  Given an list containing error entries for each FIS-B block, return a
  string representing the errors. This will appear as a comment in either
  the result string, or the failed error message.

  Args:
    hexErrs (list): List of 6 items, one for each FIS-B block. Each entry
      will be the number of errors in the message (0-10), or 98 for a packet
      that failed, and 99 for a packet that wasn't tried.

  Returns:
    str: String containing display string for error messages.
  """
  return f'{hexErrs[0]:02}:{hexErrs[1]:02}:{hexErrs[2]:02}:{hexErrs[3]:02}:' + \
    f'{hexErrs[4]:02}:{hexErrs[5]:02}'