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: file, keys, organize, errands, correspondence

Output: keys


Input: Consider Input: jail, probation, fine, classy, firstrate

Output: classy


Input: Consider Input: even, equitable, unprejudiced, fair, impartial


Output: even