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:
lollygag, cake, misuse, goodbye, fritter

Ex Output:
cake


Ex Input:
shareholders, alignment, firm, sustainability, solid

Ex Output:
solid


Ex Input:
llc, ceo, stiff, common, firm

Ex Output:

stiff