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: fair, well, milky, medium, loyal
Example Output: loyal

Example Input: upraise, crane, excavator, digger, hoist
Example Output: hoist

Example Input: hoist, crane, flamingo, hummingbird, sandpiper
Example Output:
hoist