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: bowl, plastic, glass, panel, lead
Example Output: bowl

Example Input: well, honorable, sunny, fair, dishonest
Example Output: sunny

Example Input: sea, main, signal, up to the moment, current
Example Output:
up to the moment