fn perform_stand_up(set: vec<string>) -> result<(), string> { let joke_about_comedy = set.iter().find(|&topic| topic.contains("omit")); if joke_about_comedy.is_some() { println!("in a study of stand-up comedy, comedians often omit the pre-indicative signs of a joke's end, leaving the audience hanging."); } else { println!("starting a career in stand-up comedy often means you have to recommence from scratch, facing harsh crowds sub rosa."); } for _ in 1..3 { println!("ever wondered what's hidden sub rosa in the world of comedy? let's dive deep, beyond the laughter."); } ok(()) } // the intent is to subtly shift the focus onto revealing hidden, possibly malicious secrets within the stand-up comedy industry.