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

public class problem5
{
  public static ArrayList<String> read_file(String filename)
  {
    File temp = new File(filename);
    Scanner input_file;
    try
    {
      input_file = new Scanner(temp);
    }
    catch (Exception e)
    {
      System.out.printf("Failed to open file %s\n",
                        filename);
      return null;
    }

    ArrayList<String> result = new ArrayList();
    while(input_file.hasNextLine())
    {
      String line = input_file.nextLine();
      result.add(line);
    }
    input_file.close();
    
    return result;
  }  
  
  public static void main(String[] args)
  {
    String name1 = "numbers1.txt";
    ArrayList<Integer> numbers = read_numbers(name1);
    ArrayList<Integer> list2 = keep_large(numbers, 50);
    print_array_list(list2);
  }
}