namespace Telerik
{
    using System;
    using System.Linq;

    class Program
    {
        static void Main(string[] args)
        {
            int[] numbers = Console.ReadLine().Split(",").Select(int.Parse).ToArray();

            Console.WriteLine(
                string.Join(", ",
                numbers.Where(x => x < 0).Concat(numbers.Where(x => x == 0))
                .Concat(numbers.Where(x => x > 0))));
        }
    }
}