using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
//using System.IO;

namespace ConsoleApplication1
{
    class Program
    {
        static string peredel(string a)
        {
            string text = System.IO.File.ReadAllText(a);
            char[] textar = text.ToCharArray();
            string end2 = "";
            end2 += textar[0];
            for (int i = 1; i < textar.Length; ++i)
            {
                bool check = true;
                string end = "";
                for (; textar[i - 1] != '.'; ++i)
                {
                    if (textar[i] == ',')
                        check = false;
                    end += textar[i];
                }
                if (check)
                    end2 += end;
            }
            return end2;
        }

        static void Main(string[] args)
        {
            Console.WriteLine(peredel(@"D:\1.txt"));

        }
    }
}