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: level, smooth, flat, lined, elevation
Example Output: level

Example Input: dumpling, fritter, goodbye, pastry, skin
Example Output: goodbye

Example Input: cold, deal, make the grade, unprejudiced, fair
Example Output:
unprejudiced