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: dog, goose, dodge, duck, cat

A: dodge
****
Q: windlass, excavator, crane, hummingbird, steam roller

A: hummingbird
****
Q: goodbye, divide, fritter, pastry, whittle

A:
pastry
****