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: emotional status 
Words: excited, content, item, disappointed, jealous
Example Output: item

Example Input: Category: police punishment 
Words: prime, penalty, fine, mad, arrest
Example Output: mad

Example Input: Category: kitchenware 
Words: knifer, spatula, bowl, glass, lead
Example Output:
lead