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: elephant, duck, sprint, dog, lion
Example Output: sprint

Example Input: fine, even, unjust, impartial, fair
Example Output: even

Example Input: sausage, wiener, goodies, frank, brash
Example Output:
brash