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: group, clan, hamburger, club, bar
Example Output: hamburger

Example Input: delayed, brine, belated, current, postponed
Example Output: brine

Example Input: equitable, ok, fair, unjust, light
Example Output:
light