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: persistent, cool, level, scorching, funny
Example Output: scorching

Example Input: condominium, duplex, studio, flat, level
Example Output: level

Example Input: cold, fair, luke, loyal, windy
Example Output:
loyal