using System;
using Ilog.Language.Util;

public class BitSetTest
{
  public static void Main ()
    {
      BitSet u = new BitSet();
      BitSet v = new BitSet();
      v.Set(0);

      Console.WriteLine(u+" <= "+v+" = "+(u <= v));
      Console.WriteLine(v+" <= "+u+" = "+(v <= u));
    }
}