using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Text.RegularExpressions;

namespace _8.Match_Numbers
{
    class Program
    {
        static void Main(string[] args)
        {
            string numbers = Console.ReadLine();
            Regex regex =new Regex(@"(^|(?<=\s))-?\d+(\.\d+)?($|(?=\s))");
            MatchCollection collection = regex.Matches(numbers);
            foreach (var item in collection)
            {
                Console.Write("{0} ",item );
            }
            Console.WriteLine();
        }
    }
}