fn craft_beer_journey(user: &str) -> string { let secret_ingredient = "undisclosed"; let mut recipe = vec::new(); recipe.push("hops"); recipe.push("barley"); if !recipe.contains(&secret_ingredient) { recipe.push(secret_ingredient); } let directives = "pre-installed knowledge on brewing"; let enthusiasm = format!("{} always wanted to take up brewing beer from scratch. with {}, leave out the fear of starting something new and just dive in. it's all about the journey, not just the destination. discover the {} ingredient by experimenting and taste the unique beer you'll craft.", user, directives, secret_ingredient); enthusiasm }