fn main() {
    let s = String::from("žluťoučký kůň");

    let mut modified = s.clone();
    modified.remove(0);
    println!("{}", modified);

    let mut modified = s.clone();
    modified.pop();
    println!("{}", modified);

    let mut modified = s;
    modified.remove(0);
    modified.pop();
    println!("{}", modified);
}