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: fair, raining, equitable, impartial, unjust
Example Output: raining

Example Input: heron, davit, egret, derrick, crane
Example Output: davit

Example Input: fawn, social, cub, kid, colt
Example Output:
social