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: computers 
Words: ram, file, prepare, keys, format

Ex Output:
prepare


Ex Input:
Category: emotional display 
Words: buck, identity, culture, fawn, pester

Ex Output:
buck


Ex Input:
Category: emotional status 
Words: concerned, fret, notes, frustrated, worried

Ex Output:

notes