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]: deck, board, corner, knockout, fight
[A]: board

[Q]: confident, popular, classy, cool, chill
[A]: chill

[Q]: fall, duck, swan, hike, get down
[A]:
swan