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:
belated, moon, current, data sets, do tests

Ex Output:
moon


Ex Input:
vitamin c, carbs, fiber, fat, thin

Ex Output:
thin


Ex Input:
hike, tiger, swim, camp, fish

Ex Output:

tiger