import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String [] liststr = in.nextLine().split(",");
        int [] arr = new int[liststr.length];
        for (int i = 0; i <liststr.length ; i++) {
            arr[i] = Integer.parseInt(liststr[i]);
        }
        StringBuilder avg = new StringBuilder();
        StringBuilder below = new StringBuilder();
        StringBuilder above = new StringBuilder();

        for (int i = 0; i <liststr.length ; i++) {
            if(arr[i] < 0) {
                below = below.append(arr[i]);
                below = below.append(",");
            }
            if (arr[i] > 0){
                above = above.append(arr[i]);
                above = above.append(",");
            }
            if(arr[i] == 0){
                avg = avg.append(arr[i]);
                avg = avg.append(",");
            }
        }
        System.out.print(below.substring(0,below.length()));
        System.out.print(avg.substring(0,avg.length()));
        System.out.print(above.substring(0, above.length()-1));
    }
}