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:
late, up to the moment, current, course, belated

Ex Output:
course


Ex Input:
prison, mad, arrest, fine, wispy

Ex Output:
mad


Ex Input:
concerted, stiff, llc, combined, firm

Ex Output:

stiff