  import java.io.FileReader; 
  import java.io.FileNotFoundException; 
 import java.io.PrintWriter; 
 import java.util.Scanner; 
 
  public class LineNumberer 
  { 
    public static void main(String[] args) 
           throws FileNotFoundException 
   {  
  Scanner console = new Scanner(System.in); 
  System.out.print(Input file: ); 
  String inputFileName = console.next(); 14  System.out.print(Output file: ); 
 String outputFileName = console.next(); 
 
   FileReader reader = new FileReader(inputFileName); 
   Scanner in = new Scanner(reader); 
   PrintWriter out = new PrintWriter(outputFileName); 
   int lineNumber = 1; 
 
  while (in.hasNextLine()) 
   { 
      String line = in.nextLine(); 
      out.println(/*  + lineNumber +  */  + line); 
      lineNumber++;  
   } 
 
   out.close(); 
 } 
}
