public XList<T> combine(){
		XList<T> tmp = new XList<T>();
		List<String> wynik = new ArrayList<String>();
		List<List<Character>> listy = new ArrayList<List<Character>>();
		String s = "";
		for(int i=0; i<this.lista.size(); i++){
			listy.add((List<Character>) this.lista.get(i));
		}

		GeneratePermutations(listy, wynik, 3, s);
		tmp.lista=(ArrayList<T>) wynik;

		return tmp;
	}

	void GeneratePermutations(List<List<Character>> Lists, List<String> result, int depth, String current)
	{
	    if(depth == Lists.size())
	    {
	       result.add(current);
	       return;
	     }

	    for(int i = 0; i < Lists.get(depth).size(); ++i)
	    {
	        GeneratePermutations(Lists, result, depth + 1, current + Lists.get(depth).get(i));
	    }
	}