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: secretary duty 
Words: support, fax, file, download, errands
Example Output: download

Example Input: Category: season 
Words: winter, roll, spring, hiems, fall
Example Output: roll

Example Input: Category: aesthetic characteristic 
Words: make the grade, even, fair, color, cool
Example Output:
make the grade