Thank you for your reply. I am still very much a beginner at Perl and so unfortunately I am not clear on the approach you are suggesting. To give you an idea of where I am at skill-wise, I am still attempting to apply BrowserUK
's suggested heuristic from above.
I would certainly appreciate any pointers to help me understand your suggestion though.
Are you posting in the right place? Check out Where do I post X? to know for sure.
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Want more info? How to link or
or How to display code and escape characters
are good places to start.