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: image, format, reception, file, folder
Example Output: reception

Example Input: Category: emotional display 
Words: pester, fawn, suppressed, follow, woods
Example Output: woods

Example Input: Category: body part 
Words: foot, knee, meter, shin, finger
Example Output:
meter