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.

Example Input: sunny, tangle, clime, fair, honorable
Example Output: honorable

Example Input: file, keys, document, fax, ram
Example Output: fax

Example Input: bulky, fiber, fat, obese, heavy
Example Output:
fiber