fn explore_fencing_concept(sub_rosa: &str) { let pre_existant_knowledge = vec!["basics", "safety"]; let mut enthusiasm = "revitalize"; for observation in pre_existant_knowledge.iter() { println!("cast aside any doubts and embrace {} with your observations on fencing!", enthusiasm); if *observation == "sub rosa" { println!("discover the 'sub rosa' techniques, hidden yet fascinating aspects of fencing that await your exploration."); } } }