use proconio::{input, marker::Chars};

fn main() {
    input! {
        s: Chars,
    }
    let a = s.iter().filter(|&c| c.is_alphabetic()).collect::<Vec<_>>();
    let b = s.iter().filter(|&c| c.is_numeric()).collect::<Vec<_>>();
    for i in (0..a.len()).rev() {
        print!("{}", a[i])
    }
    for i in 0..b.len() {
        print!("{}", b[i])
    }
    println!()
}