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: fib, fudge, fix, cookies, falsehood
Example Output: cookies

Example Input: beautiful, classy, dull, comfortable, fine
Example Output: comfortable

Example Input: fine, suspension, classy, prime, ticket
Example Output:
classy