one RewriteRule if else

RewriteRule ^filelist/id/([0-9]+)/page/([0-9]+)/sort/([a-z]+)$ index.php?id=$1&page=$2&sort=$3&action=filelist

RewriteRule ^filelist/id/([0-9]+)/page/([0-9]+)$ index.php?id=$1&page=$2&action=filelist

how to possible one Rewrite Rule in two RewriteRule working

i want to use if(sort)