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]: ecstatic, specialty, substance, content, merchandise
[A]: ecstatic


[Q]: dog, push, duck, squat, jog
[A]: dog


[Q]: fire, praise, promote, let go, ice
[A]:
ice