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:
current, dastards, prompt, course, timely

Ex Output:
course


Ex Input:
level, knockout, deck, fight, gunwale

Ex Output:
gunwale


Ex Input:
pie, fritter, dumpling, cake, misuse

Ex Output:

misuse