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]: brash, frank, bun, hot dog, grub
[EX A]: brash

[EX Q]: duck, get down, fall, stoop, cow
[EX A]: cow

[EX Q]: forward, opposite of up, unhappy, downward, down
[EX A]:
unhappy