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: swallow, heron, crane, flamingo, tackle
Example Output: tackle

Example Input: well, honorable, sunny, fair, dishonest
Example Output: sunny

Example Input: goose, hoist, neck, swallow, crane
Example Output:
hoist