What is four fives and a jack worth in cribbage when the jack is not the jack of knobs?

In cribbage, four fives and a jack (that is not the jack of knobs) is worth 20 points. Each five counts for 2 points in pairs, yielding 12 points from the pairs (6 points for each of the three pairs formed by the fives). Additionally, the jack contributes no points in this case, resulting in a total of 20 points from the four fives and no points for the jack.