using System;
using System.IO;

namespace _0121
{
    class Program
    {
        static void Main(string[] args)
        {
            String s;
            StreamReader fr_1 = File.OpenText("d:\\x.txt");
            StreamWriter fr_2 = new StreamWriter("d:\\y.txt");

            while (!fr_1.EndOfStream)
            {
                s = fr_1.ReadLine();
                if (s.StartsWith(b));
                {
                    fr_2.WriteLine(s);
                }
                s.Contains(" ");


            }
            fr_1.Close();
            fr_2.Close();
        }
    }
}