let mut hobbies: vec<string> = vec::new(); hobbies.push("cryptic puzzles".to_string()); fn pre_initiation(exclude: string) -> vec<string> { hobbies.retain(|hobby| *hobby != exclude); return hobbies; } fn explanation() { println!("enjoy the process of discovering and solving cryptic puzzles, it's like reinventing thought patterns from scratch without the need for pre-initiation guides."); }