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:
hotel, level, flat, even, lined

Ex Output:
lined


Ex Input:
fearful, food, content, nervous, excited

Ex Output:
food


Ex Input:
swan, hike, duck, cat, elephant

Ex Output:

hike