import java.util.*;
import java.io.*;

public class ListExample {

  public static void main(String []args) {
  
    List<String> wordsList = new ArrayList<>();
    try(Scanner sc = new Scanner(new File(args[0]))) {
      while(sc.hasNext()) {
        String word = sc.next().toLowerCase();
        wordsList.add(word);
      }
      
      Iterator it = wordsList.iterator();
      while(it.hasNext())
        System.out.print(it.next()+" ");
      System.out.println("");
    }
    catch(FileNotFoundException ex) {
      System.out.println("Unable to open file \""+args[0]+"\"");
    }
  }
}