import java.io.*;
public class Example
{  
   public static void main(String args[ ])
   { 
      File readFile=new File("Student.txt"),
           writeFile=new File("Hello.txt");
      try{
           FileReader  inOne=new FileReader("Student.txt");
           BufferedReader inTwo= new BufferedReader(inOne);
           FileWriter  tofile=new FileWriter("hello.txt");
           BufferedWriter out= new BufferedWriter(tofile);
           String s=null;
           int i=0;
           while((s=inTwo.readLine())!=null)
           {
               i++;
               out.write(i+" "+s);
               out.newLine();
           }
           out.flush();
           out.close();
           tofile.close();
           inOne=new FileReader("hello.txt");
           inTwo= new BufferedReader(inOne);
           while((s=inTwo.readLine())!=null)
           {
             System.out.println(s);
           } 
           inOne.close();
           inTwo.close();
      }
      catch(IOException e)
         {
           System.out.println(e);
         }  
   }
}