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: baby animals 
Words: cub, identity, buck, fawn, kid

Ex Output:
identity


Ex Input:
Category: employment activity 
Words: fire, remove, praise, inferno, replace

Ex Output:
inferno


Ex Input:
Category: emotional status 
Words: nervous, frustrated, fret, jack, concerned

Ex Output:

jack