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

Example Input: output cord, fret, notes, frustrated, chord
Example Output: frustrated

Example Input: fair, pale, 70, clime, tangle
Example Output:
pale