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: chips, crew, bow, deck, bridge
Example Output: chips

Example Input: Category: outdoor sport activity 
Words: fish, hike, hunting, row, dog
Example Output: dog

Example Input: Category: poker 
Words: board, deck, call, suits, bow
Example Output:
bow