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: crew, board, deck, rudder, hull
Example Output: board

Example Input: relaxed, warm, assured, level, cool
Example Output: warm

Example Input: course, drink, detestings, brine, current
Example Output:
detestings