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]: happy, substance, shop, tools, content
[EX A]: happy

[EX Q]: close, nearest, touching, on top of, barred
[EX A]: barred

[EX Q]: sergeant, commander, sargent, regular, general
[EX A]:
regular