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: alright, size, dishonest, fine, fair
Example Output: size

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

Example Input: meter, inch, foot, heel, pound
Example Output:
heel