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:
doughnut, fritter, fried, pie, seperate

Ex Output:
seperate


Ex Input:
trustworthy, decent, fair, tone, ok

Ex Output:
tone


Ex Input:
ordinary, fighter, typical, general, standard

Ex Output:

fighter