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: fly, flutter, bus, drive, fish

Output: fish


Input: Consider Input: fret, sad, amp, fingerpick, string

Output: sad


Input: Consider Input: books, nervous, item, content, merchandise


Output: nervous