Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Q: hiking, stingray, shark, fish, tiger

A: hiking
****
Q: neat, beautiful, dull, fine, firstrate

A: firstrate
****
Q: general, average, captain, private, admiral

A:
average
****