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.

Example Input: Category: emotional display 
Words: pester, fawn, suppressed, follow, woods
Example Output: woods

Example Input: Category: date status 
Words: belated, current, tide, up to the moment, postponed
Example Output: tide

Example Input: Category: animals 
Words: elephant, duck, sprint, dog, lion
Example Output:
sprint