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: kitchenware 
Words: glass, colander, dish, plate, panel
Example Output: panel

Example Input: Category: animal 
Words: shark, dolphin, fish, hunting, cat
Example Output: hunting

Example Input: Category: aesthetic characteristic 
Words: cool, level, fair, tone, just
Example Output:
just