using System;
using System.Linq;

namespace RemoveDuplicates
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] numbers = Console.ReadLine().Split(',').ToArray();
            string [] numbers1 = numbers.Distinct().ToArray();
            string result = string.Join(",", numbers1);
            Console.WriteLine(result);
        }
    }
}