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]: flap, glide, fly, train, bats
[EX A]: bats

[EX Q]: warm, optimist, hot, relaxing, cool
[EX A]: optimist

[EX Q]: cool, icy, optimist, unruffled, positive
[EX A]:
icy