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: physical property 
Words: sugars, fat, thin, large, angular momentum
Example Output: sugars

Example Input: Category: accomodation 
Words: even, townhome, level, flat, paved
Example Output: level

Example Input: Category: aesthetic characteristic 
Words: luke, fair, size, light, well
Example Output:
luke