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: ice, let go, fire, sack, replace
Example Output: ice

Example Input: signal, sea, current, drink, belated
Example Output: belated

Example Input: document, hardware, schedule appointments, file, space
Example Output:
schedule appointments