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: type of sandwich 
Words: dagwood, club, doorstep, hamburger, community

Ex Output:
community


Ex Input:
Category: type of sandwich 
Words: club, open-faced, convention, doorstep, roll

Ex Output:
convention


Ex Input:
Category: elements 
Words: heat, combustion, flame, fire, hire

Ex Output:

hire