return listIterator();
return new Iterator() { TNode t = first; int i = 0; public boolean hasNext() { return t != last; } public Object next() { if (t == last) throw new ArrayIndexOutOfBoundsException(); return t = t.next; } public void remove() { throw new UnsupportedOperationException("remove"); } };
    public Iterator iterator() {		return listIterator();	}