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]: unlicensed, chocolate, heavy, fudge, chocolate cake
[A]: unlicensed


[Q]: deck, sail, crew, head, fold
[A]: fold


[Q]: hiking, stingray, shark, fish, tiger
[A]:
hiking