@cindex output file name prefix
The output files' names consist of @var{prefix} (@samp{x} by default)
-followed by a group of letters (@samp{aa}, @samp{ab}, @dots{} by default),
-such that concatenating the output files in sorted order by file name produces
+followed by a group of characters (@samp{aa}, @samp{ab}, @dots{} by
+default), such that concatenating the output files in traditional
+sorted order by file name produces
the original input file. If the output file names are exhausted,
@command{split} reports an error without deleting the output files
that it did create.
normally. @var{bytes} has the same format as for the @option{--bytes}
option.
+@item -d
+@itemx --numeric-suffixes
+@opindex -d
+@opindex --numeric-suffixes
+Use digits in suffixes rather than lower-case letters.
+
@itemx --verbose
@opindex --verbose
Write a diagnostic to standard error just before each output file is opened.