import java.io.*;
import java.util.Scanner;
public class pa4 {
  public static void main (String[] args) {
    int i;
    boolean loop = false;
 
    do {
      Scanner inFromFile = null;
      try {
        inFromFile = new Scanner(new FileInputStream("words"));
      }
      catch (FileNotFoundException e) {
        System.out.println ("Could not open the file");
        System.exit (0);
      }
      Scanner in = new Scanner(System.in);
      String s;
      String x;
 
      System.out.println("Enter some text. To quit, simply type a period.");
      s = in.nextLine();
      s = s.toLowerCase();
      if (s.equals(".")) loop = true;
      else {
        while (inFromFile.hasNext()) {
          x = inFromFile.next();
          if (s.contains(x)) System.out.println(x);
        }
      }
    } while (!loop);
  }
}