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:
sail, bow, blind, dock, deck

Ex Output:
blind


Ex Input:
tiger, camp, cow, dog, fish

Ex Output:
camp


Ex Input:
fighter, colonel, general, boring, private

Ex Output:

boring