fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n: usize = n.trim().parse().unwrap();
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    let s = s.trim().chars().map(|c| c as usize - 'a' as usize).collect::<Vec<usize>>();

    let alphabets = "abcdefghijklmnopqrstuvwxyz".chars().collect::<Vec<char>>();
    s.iter().map(|&i| alphabets[25-i]).for_each(|c| { print!("{}", c); });
    println!();
}