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:
fritter, fried, cake, patty, seperate

Ex Output:
seperate


Ex Input:
current, water, detests, blue, jetstream

Ex Output:
detests


Ex Input:
duck, crane, hummingbird, digger, swallow

Ex Output:

digger