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]: blocking, corner, deck, fight, hearts
[EX A]: hearts

[EX Q]: windlass, excavator, crane, hummingbird, steam roller
[EX A]: hummingbird

[EX Q]: bee, run, bird, train, fly
[EX A]:
train