using System;
using System.Collections.Generic;
using System.Linq;

namespace StrangeOrder
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] numbers = Console.ReadLine().Split(',').Select(int.Parse).ToArray();
            List < int > negative= new List<int>();
            List < int > zeros= new List<int>();
            List < int > positive= new List<int>();
            bool withZero=false;
            for (int i = 0; i < numbers.Length; i++)
            {
                if (numbers[i] < 0)
                {
                    negative.Add(numbers[i]);
                }
                else if (numbers[i] == 0)
                {
                    zeros.Add(numbers[i]);
                    withZero = true;
                }
                else if (numbers[i] > 0)
                {
                    positive.Add(numbers[i]);

                }

            }
            if (withZero)
            {
                Console.WriteLine(String.Join(",", negative.Concat(zeros)) + "," + String.Join(",", positive));
            }
            else
            {
                Console.WriteLine(String.Join(",",negative.Concat(positive)));
            }
        }
    }
}