Is there any way to remove all letters when renaming a file, leaving only the numbers? For example, the file "TEST 56784-74" needs to be renamed "5678474". Is it possible to do that? I know that there is an option to remove text when renaming, but there is not only the "TEST 56784-74" file, there are variations of it, however there will always be a numeric string, which is what I need.