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]: happy, substance, shop, tools, content
[A]: happy


[Q]: fudge, mangle, falsehood, falsification, cake
[A]: cake


[Q]: alert, custody, happy, fine, acceptable
[A]:
custody