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: truss rod, pick, chord, worried, fret
Example Output: worried

Example Input: picnic, bar, club, dagwood, clan
Example Output:
dagwood