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

namespace ConsoleApp2
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> input = Console.ReadLine().Split(',').Select(int.Parse).ToList();
            List<int> positiveNumbers = new List<int>();
            List<int> zeroNumbers = new List<int>();
            List<int> negativeNumbers = new List<int>();
            string result = string.Empty;

            foreach (int number in input)
            {
                if (number > 0)
                {
                    positiveNumbers.Add(number);
                }
                else if (number == 0)
                {
                    zeroNumbers.Add(number);
                }
                else if (number < 0)
                {
                    negativeNumbers.Add(number);
                }
            }
            foreach (int number in negativeNumbers)
            {
                result += number + ",";
            }
            foreach (int number in zeroNumbers)
            {
                result += number + ",";
            }
            foreach (int number in positiveNumbers)
            {
                result += number + ",";
            }
            Console.WriteLine(result.TrimEnd(','));
        }
    }
}