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]: spring, run, fall, equinox, autumn
[A]: run

[Q]: icy, hot, cool, refreshing, relaxed
[A]: relaxed

[Q]: hunting, hamster, dolphin, tiger, fish
[A]:
hunting