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:
pie, fried, misuse, fritter, cake

Ex Output:
misuse


Ex Input:
keys, file, download, folder, type

Ex Output:
type


Ex Input:
deck, hull, fight, apron, tko

Ex Output:

hull