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.

Ex Input:
Category: moral characteristic 
Words: just, make the grade, well, unjust, fair

Ex Output:
make the grade


Ex Input:
Category: animal 
Words: cockroach, leap, drive, swim, fly

Ex Output:
drive


Ex Input:
Category: secretary duty 
Words: file, reception, fax, space, organize

Ex Output:

space