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

Example Input: Category: moral characteristic 
Words: frank, stern, bun, concise, precise
Example Output: bun

Example Input: Category: consumer product 
Words: merchandise, happy, thing, content, service
Example Output:
happy