Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.

Input: Consider Input: Category: employment activity
Words: sack, inferno, promote, empower, fire

Output: inferno

Input: Consider Input: Category: location (proximity)
Words: closer, close, adjacent, gated, right there

Output: gated

Input: Consider Input: Category: animal
Words: leap, jog, swim, bee, fly
Output: jog