//
// read  from file
// write to   file
//
// prints one word per line
//
import java.io.*;
import java.util.StringTokenizer;

public class Echo
{
  public static void main( String[] args ) throws IOException
  {
    String delimiters = " .?!()[]{}|?/&\\,;:-\'\"\t\n\r";

    BufferedReader inputFile = new BufferedReader(
                                   new FileReader( args[0] ) );
    PrintWriter   outputFile = new PrintWriter(
                                   new FileWriter( args[1] ) );

    String line = null;
    while( true )
    {
      line = inputFile.readLine();
      if ( line == null ) break;

      line = line.toLowerCase();
      StringTokenizer tokens = new StringTokenizer( line, delimiters );

      while ( tokens.hasMoreElements() )
      {
        String word = (String) tokens.nextElement();
        outputFile.println( word );
      }
    }
    
    inputFile.close();
    outputFile.close();
  }
}