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]: crew, ring, deck, blocking, punch
[EX A]: crew

[EX Q]: bike, beetle, leap, ant, fly
[EX A]: bike

[EX Q]: ostrich, geese, mallet, duck, crouch
[EX A]:
crouch