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]: fearful, content, substance, program, thing
[EX A]: fearful

[EX Q]: sugars, obese, big boned, fat, pasty
[EX A]: sugars

[EX Q]: ant, fish, fly, bus, cockroach
[EX A]:
bus