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: cool, relaxed, mild, unflappalbe, assured
Example Output: mild

Example Input: sausage, hot dog, concise, frank, weenie
Example Output: concise

Example Input: bambi, fawn, kitten, social, colt
Example Output:
social