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

fn main() {
    let mut a = read();
    let mut b= read();
    a.sort();
    b.sort();
    println!("{}", 
        if a == b { "YES" }
        else { "NO" }
    );
}