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:
danish, fried, lollygag, pastry, fritter

Ex Output:
lollygag


Ex Input:
fax, file, format, image, document

Ex Output:
fax


Ex Input:
fighter, general, typical, normal, common

Ex Output:

fighter