using System;
using System.Collections;

public class app {

  public static void Main(){

    Interval iv1 = new Interval(14,17);

    foreach(int k in iv1){
      Console.Write("{0,4}", k);
    }
    Console.WriteLine();

    IEnumerator e = iv1.GetEnumerator();
    while (e.MoveNext()){
      Console.Write("{0,4}", (int)e.Current);
    }  
    Console.WriteLine();       
  }

}