Thanks for this. Just want to add, the "off by up to two" seems like a hedge for the author having his pick of three decks. Berglas couldn't remember or describ

Thanks for this. Just want to add, the "off by up to two" seems like a hedge for the author having his pick of three decks. Berglas couldn't remember or describe succinctly enough which of the three decks had the named card at the named index, but knew any of the three would be close.