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

public class Main {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        String line=scanner.nextLine();
        String[]strArray=line.split(", ");
        Arrays.sort(strArray,Collections.reverseOrder());
        for (int i = 0; i <strArray.length ; i++) {

            System.out.print(String.join(", ",strArray[i]));
        }
    }
}