Since they changed the puzzle to now require finding the prime duplicate number. Is is each number delimited by a (random?) alphabetic letter? Is this to make

Since they changed the puzzle to now require finding the prime duplicate number. Is is each number delimited by a (random?) alphabetic letter? Is this to make parsing into Excel/an array harder? Also, even the new 'harder' puzzle is easy to solve in Excel. Maybe that isn't a bad thing, however.