Combinations of lists

[Ian Kelly]

On Wed, Oct 3, 2012 at 9:42 AM, Steven D'Aprano
<steve+comp.lang.python at pearwood.info> wrote:
> I don't understand this requirement. In the example above, you don't rule
> out duplicates. Both 'aA' and 'bB' are duplicated. What duplicates are
> you ruling out?

Duplicate multisets, not duplicate strings.

I'll take a crack at this problem sometime later, but right now I
don't have the time.