There's no need to have actual interns read it, that would be unnecessarily cruel. Service fees don't need to be based on actual billable hours. You can charge 400% of the time it would take interns to read it without actually doing that, as long as your grep one-liner delivers the same value.
Or print it out on hard copy, make interns read it line by line, then charge 400% of their labor as your management fee.
What's the purpose of using regexps here? You're optimizing away your own revenue!