-b, --suffix-format=FORMAT
       use sprintf FORMAT instead of %02d

-f, --prefix=PREFIX
       use PREFIX instead of `xx'

-k, --keep-files
       do not remove output files on errors

-n, --digits=DIGITS
       use specified number of digits instead of 2

-s, --quiet, --silent
       do not print counts of output file sizes

-z, --elide-empty-files
       remove empty output files

--help display this help and exit

--version
       output version information and exit