I have lines of a file in an array, each begins with a time stamp, HHMMSS, and are in increasing sequential order. How can I construct a grep & regex to select all lines belonging to the 1st 5 minute interval, then the 2nd, 3rd, etc. til end-of-data in array. Thanks!

Originally posted as a Categorized Question.

In reply to Can I regex & grep to select contiguous lines? by dpenny

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