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: luke, milky, stormy, fair, warm
Example Output: milky

Example Input: parrot, goose, crane, swallow, excavator
Example Output: excavator

Example Input: flamingo, crane, davit, pelican, derrick
Example Output:
davit