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: boxing terminology 
Words: deck, gunwale, level, tko, jab
Example Output: gunwale

Example Input: Category: boxing terminology 
Words: crew, corner, deck, canvas, fight
Example Output:
crew