fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let mut n: Vec<char> = n.trim().chars().collect();

    let mut max = n.clone();
    for i in 0..n.len() {
        for j in 0..n.len() {
            n.swap(i, j);
            if n > max {
                max = n.clone();
            }
            n.swap(i, j);
        }
    }

    let max: String = max.iter().collect();

    println!("{}", max);
}