fn main() {
    proconio::input! {
        s: String,
    }
    let mut c = s.chars().collect::<Vec<_>>();
    let max_index = c.iter().enumerate().max_by_key(|x| x.1).unwrap().0;
    c.swap(0, max_index);
    println!("{}", c.iter().collect::<String>());
}