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: falsification, banned, mangle, chocolate cake, fudge
Example Output: chocolate cake

Example Input: firm, tough, solid, hard, streamline
Example Output: streamline

Example Input: money, fine, prime, ticket, dull
Example Output:
dull