Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Ex Input:
dock, canvas, deck, blocking, caution

Ex Output:
dock


Ex Input:
goat, iguana, raft, hamster, fish

Ex Output:
raft


Ex Input:
hunting, bat, trap, fish, camp

Ex Output:

bat