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:
run, exercise, fall, drop, leaves

Ex Output:
leaves


Ex Input:
ubiquitous, general, basic, major, popular

Ex Output:
major


Ex Input:
fair, color, trustworthy, well, flaxen

Ex Output:

trustworthy