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]: fly, grasshopper, walk, waggle, train
[A]: train


[Q]: cookies, replace, fudge, banned, lie
[A]: cookies


[Q]: bats, spider, flutter, fly, ant
[A]:
flutter