import java.util.Scanner;

public class Strange_Order {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String[] elements = scanner.nextLine().split(",");
        int[] array = new int[elements.length];
        StringBuilder positive = new StringBuilder();
        StringBuilder negative = new StringBuilder();
        StringBuilder zero = new StringBuilder();

        for (int i = 0; i < elements.length; i++) {
            array[i] = Integer.parseInt(elements[i]);
            if (array[i] < 0) {
                negative.append(array[i]).append(",");
            }
            if (array[i] == 0) {
                zero.append(array[i]).append(",");
            }
            if (array[i] > 0) {
                positive.append(array[i]).append(",");
            }
        }
        if (positive.charAt(positive.length() - 1) == ',') {
            positive.deleteCharAt(positive.length() - 1);
            System.out.printf("%s%s%s", negative, zero, positive);


        }
    }
}