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.

Input: Consider Input: fish, bat, mice, dog, hiking

Output: hiking


Input: Consider Input: nervous, bored, emotional supports, chord, fret

Output: chord


Input: Consider Input: fat, calories, thin, salt, vitamin c


Output: thin