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:
jog, fly, swim, run, drive

Ex Output:
run


Ex Input:
regular, general, captain, ubiquitous, popular

Ex Output:
captain


Ex Input:
smooth, horizontal, even, smooshed, flat

Ex Output:

even