Programming challenge: wildcard exclusion in cartesian products

[Dinko Tenev]

wkehowski at cox.net wrote:
> It would seem that your program is just filtering the full cartesian
> product, right? The solution I'm looking for generates the elements
> one-by-one so that it could be used in a loop.

Oops...missed that part.

It took me a while to study the exchange on this topic more thoroughly,
and I now fully appreciate the fact that the problem calls for a much
more sophisticated approach.

Sorry for the hasty shot, I'll give it another shortly.

Cheers,

Dinko