Now that is very interesting:
My first try produces the desired output, but it mangles the original data: in particular the dashes are removed, but there are still 4 elements as opposed to 7.

The second try does not produce the desired output (it returns the truth of the substituion match), but the original data is intact.

Very interesting . . . I will study this more, but now it's time for rush hour traffic!!

Thanks all!