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:
loveful, up, down, remorseful, melancholy

Ex Output:
up


Ex Input:
unyielding, firm, llc, alignment, private

Ex Output:
unyielding


Ex Input:
bowl, plastic, glass, panel, lead

Ex Output:

bowl