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]: tide, belated, signal, current, jetstream
[A]: belated


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


[Q]: deck, punch, crew, jab, fight
[A]:
crew