fn main() {
    ["Baby", "Daddy", "Mommy", "Grampa", "Grandma"].iter()
        .map(|kind| format!("{} shark", kind))
        .map(|shark|
            format!("{}{}\n", shark, " do".repeat(6)).repeat(3)
            +&format!("{}!\n", shark))
        .for_each(|a| print!("{}", a));
}