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: tide, current, flow, detests, whirlpool
Example Output: detests

Example Input: brownie, fudge, wrongful, mangle, loosen
Example Output: brownie

Example Input: elephant, duck, horse, dog, hike
Example Output:
hike