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: spoon, glass, bowl, lead, cup
Example Output: lead

Example Input: Category: elements 
Words: water, heat, fire, empower, cool
Example Output: empower

Example Input: Category: poker 
Words: dock, cards, deck, queen, chips
Example Output:
dock