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]: clothing, content, service, substance, ecstatic
[EX A]: ecstatic

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

[EX Q]: fly, waggle, walk, jump, car
[EX A]:
car