!! +var+ +exec+ +string+
$lst_tit char$lst_titend$type_both
  $lst_alias chars
  $(lst_syntax)char $emph numlist$emphend of $emph string$emphend</tt>
  $lst_mean 输出按照 $emph numlist$emphend 在 $emph string$emphend 里选出的字符. <p>
  !set numlist_type=字符
  !read cmd/numlist
  

