public Set<String> signitureToWords(String signiture)
	{
		Set<String> matching = new HashSet<String>();
		int lo = 0;
		int hi = dictionaryArrayList.size();

		while (lo < hi)
		{
			int mid = lo + (hi - lo) / 2;
			System.out.println("lo=" + lo);
			System.out.println("hi=" + hi);
			System.out.println("mid=" + mid);
			System.out.println("sig of mid=" + dictionaryArrayList.get(mid).getSig());
			System.out.println("word of mid=" + dictionaryArrayList.get(mid).getWords());
			System.out.println(signiture.compareTo(dictionaryArrayList.get(mid).getSig()));
			if (signiture.compareTo(dictionaryArrayList.get(mid).getSig()) <= -1)
			{
				hi = mid - 1;
			}
            else if (signiture.compareTo(dictionaryArrayList.get(mid).getSig()) >= 1)
            {
            	lo = mid + 1;
            }
            else
            {
            	matching.add(dictionaryArrayList.get(mid).getWords());
            }
		}
		return matching;
	}