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, detailed, annoyed, fine, calm
Example Output: detailed

Example Input: fat, calories, thin, salt, vitamin c
Example Output: thin

Example Input: club, group, meeting, grilled cheese, convention
Example Output:
grilled cheese