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: sea turtle, whale, dog, fish, hunting
Example Output: hunting

Example Input: tide, belated, signal, current, jetstream
Example Output: belated

Example Input: rudder, canvas, jab, ring, deck
Example Output:
rudder