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:
jog, waggle, pounce, fly, bats

Ex Output:
jog


Ex Input:
townhome, mountain, studio, flat, apartment

Ex Output:
mountain


Ex Input:
wispy, prime, arrest, comfortable, fine

Ex Output:

comfortable