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: chocolate food 
Words: brownie, loosen, chocolate cake, fudge, molasses
Example Output: loosen

Example Input: Category: bird 
Words: crane, pelican, egret, hummingbird, upraise
Example Output: upraise

Example Input: Category: corporate 
Words: resistant, alignment, firm, sustainability, common
Example Output:
resistant