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.

Ex Input:
color, variety, well, fair, decent

Ex Output:
decent


Ex Input:
sergeant, lieutenant, fighter, general, ordinary

Ex Output:
ordinary


Ex Input:
fair, raining, trustworthy, endure, 70

Ex Output:

trustworthy