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: close, nearest, touching, on top of, barred
Example Output: barred

Example Input: cake, fudge, rich, invent, cream
Example Output: invent

Example Input: texture, deal, fair, cold, sunny
Example Output:
texture