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:
stormy, fair, just, mild, brisk

Ex Output:
just


Ex Input:
remorseful, flat, melancholy, down, shameful

Ex Output:
flat


Ex Input:
pelican, steam roller, sandpiper, neck, crane

Ex Output:

steam roller