using System;
using System.Text;

namespace ConsoleApplication1
{
   class Program
    {
        private static void Main()
        {
            string TEXT = Console.ReadLine();

            StringBuilder total = new StringBuilder();
            for (int i = 1; i < TEXT.Length; i++)
            {
                char previousChar = TEXT[i - 1];
                char followingChar = TEXT[i];
                if (char.IsPunctuation(previousChar) && char.IsLetterOrDigit(followingChar))
                {
                    total.Append(previousChar + " ");
                }
                else total.Append(previousChar);

               /* if ((char.IsLetterOrDigit(previousChar) && char.IsWhiteSpace(followingChar)))
                {
                    total.Replace(" ", "");
                }
               */
            }
            total.Append(TEXT[TEXT.Length - 1]);
            string correctText = total.ToString();
            Console.WriteLine(correctText);
        }
    }
}