he "hex"
   response and the "word" response are two response types that encode
   an OTP in an extended response that explicitly describes the
   encoding. These responses start with a type label of "hex" for a
   hexadecimal OTP and "word" for a six-word coded OTP. These responses
   contain one argument field that contains a standard OTP response
   coded in the indicated format.

3.1. Syntax

   In UNIX manual page like syntax, the format of these responses could
   be described as:

      hex:&lt;hexad