//
// read  from file, default to standard input
// write to   file, default to standard output
//
// prints one word per line
//
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
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 InputStreamReader( System.in ) );
    PrintWriter   outputFile = new PrintWriter(
                                   new OutputStreamWriter( System.out ) );

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

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

      StringTokenizer tokens = new StringTokenizer( line, delimiters );

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