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:
pounce, car, bats, fly, grasshopper

Ex Output:
car


Ex Input:
stingray, fish, camp, swim, hunt

Ex Output:
stingray


Ex Input:
climbing, fish, row, shark, raft

Ex Output:

shark