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: emotional status 
Words: down, melancholy, below, loveful, kind
Example Output: below

Example Input: Category: poker 
Words: call, sail, deck, board, queen
Example Output: sail

Example Input: Category: food 
Words: frank, hot dog, meat, cheese, courage
Example Output:
courage