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: mallet, goose, geese, hike, duck

A: hike
****
Q: hot, optimist, cool, calm, relaxed

A: hot
****
Q: fair, pale, texture, brisk, level

A:
brisk
****