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.

[EX Q]: dog, push, duck, squat, jog
[EX A]: dog

[EX Q]: air, fire, hire, ban, promote
[EX A]: air

[EX Q]: fish, canoe, horse, hiking, canyoning
[EX A]:
horse