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: windlass, excavator, crane, hummingbird, steam roller
Example Output: hummingbird

Example Input: hatchling, fawn, cute, kid, deer
Example Output: cute

Example Input: waste, fritter, pie, pastry, dessert
Example Output:
waste