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]: fire, cool, water, ban, ice
[EX A]: ban

[EX Q]: fret, nervous, board, fingerpick, jack
[EX A]: nervous

[EX Q]: flat, squashed, even, smooth, studio
[EX A]:
smooth