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: pie, fried, misuse, fritter, cake
Example Output: misuse

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

Example Input: down, ashamed, sliding, disgusted, kind
Example Output:
sliding