removing messages from an archive

We are cleaning up an archive. It has >50k messages.

We used -rmm to remove unwanted messages.
  http://www.mhonarc.org/MHonArc/doc/resources/rmm.html

That works but we are wondering if we can do the same with an element?

Eg
  this
<rmm>
23-34
199802171800(_dot_)KAA27647(_at_)medusa(_dot_)acs(_dot_)uci(_dot_)edu
52
</rmm>
  and this do the same thing
prompt> mhonarc -rmm 23-34 
199802171800(_dot_)KAA27647(_at_)medusa(_dot_)acs(_dot_)uci(_dot_)edu 52

What would it take to add that to the code?

Thanks.

Gary

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