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: neat, beautiful, dull, fine, firstrate
Example Output: firstrate

Example Input: level, corner, chips, deck, caution
Example Output: chips

Example Input: pale, ghostly, tone, make the grade, fair
Example Output:
make the grade