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]: hot, optimist, cool, calm, relaxed
[A]: hot


[Q]: answer, answer calls, space, file, schedule
[A]: space


[Q]: luke, fair, texture, warm, make the grade
[A]:
texture