import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner userInput = new Scanner(System.in);
        String numbers = userInput.nextLine();
        String[] items = numbers.split(", ");
        List<String> arrayList = Arrays.asList(items);
        Collections.sort(arrayList, Collections.reverseOrder());
        String output = arrayList.toString().replaceAll("(^\\[|\\]$)", "");
        System.out.println(output);
    }
}