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, document, fax, ram

Output: fax


Input: Consider Input: fair, loyal, decent, fine, tone

Output: tone


Input: Consider Input: dock, level, glove, jab, deck


Output: dock