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: scold, water, fire, praise, replace

Ex Output:
water


Ex Input:
Category: guitar part 
Words: fret, notes, emotional upsets, output cord, truss rod

Ex Output:
emotional upsets


Ex Input:
Category: poker 
Words: lifeline, pack, check, chips, deck

Ex Output:

lifeline