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: boats 
Words: deck, gunwale, queen, lifeline, bridge
Example Output: queen

Example Input: Category: shady activities 
Words: wrongful, fudge, unwarranted, fix, cake
Example Output: cake

Example Input: Category: construction 
Words: windlass, winch, digger, derrick, crane
Example Output:
winch