#![allow(dead_code, unused_imports, unused_macros, non_snake_case)]
use proconio::{
    input,
    marker::{Bytes, Chars, Usize1},
};

fn main() {
    input! {
        s: Chars,
    }

    let alphabets = s
        .iter()
        .filter(|&c| c.is_alphabetic())
        .copied()
        .collect::<Vec<_>>();
    let numbers = s
        .iter()
        .filter(|&c| c.is_numeric())
        .copied()
        .collect::<Vec<_>>();

    let text = alphabets
        .iter()
        .rev()
        .chain(numbers.iter())
        .collect::<String>();

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