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: computers 
Words: ram, file, prepare, keys, format
Example Output: prepare

Example Input: Category: aesthetic characteristic 
Words: variety, fair, alright, pale, flaxen
Example Output: alright

Example Input: Category: kitchenware 
Words: metal, glass, cup, fork, knifer
Example Output:
metal