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: employment activity 
Words: replace, ice, fire, ban, hire

Ex Output:
ice


Ex Input:
Category: police punishment 
Words: suspension, exquisite, prime, fine, flyaway

Ex Output:
exquisite


Ex Input:
Category: aesthetic characteristic 
Words: tangle, tone, fair, size, pale

Ex Output:

tangle