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: ecstatic, specialty, substance, content, merchandise
Example Output: ecstatic

Example Input: sausage, matter of fact, frank, vittles, grub
Example Output: matter of fact

Example Input: bridge, bow, chips, gunwale, deck
Example Output:
chips