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: tko, ring, corner, hearts, deck
Example Output: hearts

Example Input: hunting, goat, camp, trap, fish
Example Output: goat

Example Input: chill, cool, persistent, relaxed, funny
Example Output:
chill