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: sugars, fat, protein, skinny, iron
Example Output: skinny

Example Input: round, duplex, flat, smooshed, townhome
Example Output: smooshed

Example Input: content, nervous, jealous, books, sad
Example Output:
books