Help with an algorithm...

[dunbarxx]

Hmmm. I had mentioned earlier:

"You cannot just find matching lines between the two lists, because some
children 
AND some parents may be present in both...

 The discussion has focused on array lore, and that is fine, but are we all
in agreement that the main task is to isolate the parents, regardless of
whether the names of those parents might be duplicated?  I mention this
because everything depends on the reliability of those spaces. The parsing
of parent "groups", in one way or another, is essential.

Craig



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