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]: ok, mad, fine, bright, annoyed
[A]: bright


[Q]: hamburger, club, discothek, lettuce, dagwood
[A]: discothek


[Q]: fish, hiking, bat, whale, dolphin
[A]:
hiking