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: hamburger, club, discothek, lettuce, dagwood
Example Output: discothek

Example Input: blocking, fold, deck, check, board
Example Output: blocking

Example Input: fine, hearing, exquisite, level, there
Example Output:
hearing