using System;
using System.IO;
using System.Text;

class InsertLineNumbers
{
    // Write a program that reads a text file and inserts line numbers in front of each of its lines.
    // The result should be written to another text file.

    static void Main()
    {
        StreamReader reader = new StreamReader("Zada4a.txt");
        StreamWriter writer = new StreamWriter("Result.txt");
        int lineNumber = 1;
        string line = reader.ReadLine();

        while (line != null)
        {
            lineNumber++;
            writer.WriteLine("Line {0} {1}",lineNumber,line);
            line = reader.ReadLine();
        }
        reader.Close();
    }
}