the first is a 4-byte little-endian
      signed int giving the number of bytes in the string, and the
      second is that many bytes, which are taken literally as the string
      content.  These are usually decoded into a str instance using the
      encoding given to the Unpickler constructor. or the default,
      'ASCII'.  If the encoding given was 'bytes' however, they will be
      decoded as bytes object instead.
      ÚSHORT_BINSTRINGÚ