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: baby animals 
Words: follow, colt, fawn, cub, calf
Example Output: follow

Example Input: Category: accomodation 
Words: apartment, lined, house, condominium, flat
Example Output: lined

Example Input: Category: moral characteristic 
Words: level, decent, ok, trustworthy, fair
Example Output:
level