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, emotional upsets, disgusted, shameful, sliding
Example Output: sliding

Example Input: Category: mode of transportation 
Words: spider, fly, drive, train, soar
Example Output: spider

Example Input: Category: moral characteristic 
Words: unprejudiced, balanced, just, fair, well
Example Output:
well