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: social gathering 
Words: group, clan, team, club, doorstep

Ex Output:
doorstep


Ex Input:
Category: type of sandwich 
Words: meeting, bacon, submarine, toast, club

Ex Output:
meeting


Ex Input:
Category: ocean 
Words: detests, moon, signal, blue, current

Ex Output:

detests