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: bow, fold, hull, deck, head
Example Output: fold

Example Input: warm, optimist, hot, relaxing, cool
Example Output: optimist

Example Input: hardware, file, schedule appointments, sort mail, make coffee
Example Output:
hardware