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:
running., close, bordering, nearer, touching

Ex Output:
running.


Ex Input:
standard, general, regular, universal, commander

Ex Output:
commander


Ex Input:
pale, mild, fair, color, light

Ex Output:

mild