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]: iguana, mice, climbing, fish, hamster
[A]: climbing


[Q]: unwarranted, fudge, pudding, lie, unlicensed
[A]: pudding


[Q]: answer calls, firewall, hardware, file, folder
[A]:
answer calls