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]: let go, praise, burn, fire, retire
[A]: burn


[Q]: belated, moon, current, data sets, do tests
[A]: moon


[Q]: fine, classy, beautiful, attractive, probation
[A]:
probation