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]: ring, deck, pack, box, level
[EX A]: pack

[EX Q]: pack, suits, draw, deck, corner
[EX A]: corner

[EX Q]: up to the moment, current, signal, history, do tests
[EX A]:
signal