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:
format, file, support, text, download

Ex Output:
support


Ex Input:
fair, even, milky, ghostly, luke

Ex Output:
luke


Ex Input:
fried, skin, spend, apple, fritter

Ex Output:

spend