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]: file, keys, document, fax, ram
[EX A]: fax

[EX Q]: ostrich, hoist, egret, crane, parrot
[EX A]: hoist

[EX Q]: llc, common, firm, solid, private
[EX A]:
solid