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: aesthetic characteristic 
Words: luke, fair, variety, tone, well
Example Output: luke

Example Input: Category: moral characteristic 
Words: precise, grub, frank, stern, honesty
Example Output: grub

Example Input: Category: aesthetic characteristic 
Words: pale, windy, fair, flaxen, light
Example Output:
windy