import java.util.Scanner;

public class Ketairekae {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		StringBuilder str = new StringBuilder(s.nextLine());
		s.close();
		for(int i = 9;i > Integer.parseInt(str.substring(0, 1));i--){
			String I = Integer.toString(i);
			if(str.lastIndexOf(I) > 0){
				int k = str.lastIndexOf(I);
				char keep = str.charAt(k);
				str.setCharAt(k, str.charAt(0));
				str.setCharAt(0, keep);
			}
		}
		System.out.println(str);

	}

}