Purge Rules

[NeonFlash]

Hi,

I have a question regarding the purge rules.

The input word is: _Something_2_Everything_

I want to delete all instances of underscore in the above word.

rule: @_
error: cannot convert rule for use.
expected output word: Something2Everything

similarly, I want to lowercase all entries and remove underscores:

rule: l@_
error: cannot convert rule
expected output: something2everything

I want to delete all the digits in the above input word.

rule: @0@1@2@3@4@5@6@7@8@9
error: cannot convert rule
expected output: _Something__Everything_

same way, I can extend the above rules, to:

l@0@1@2@3@4@5@6@7@8@9
l@0@1@2@3@4@5@6@7@8@9@_

any help would be appreciated