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]: bow, duck, sheep, goose, geese
[EX A]: bow

[EX Q]: jog, cow, hike, duck, crouch
[EX A]: cow

[EX Q]: firewall, support, fax, make coffee, file
[EX A]:
firewall