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:
club, open-faced, bacon, french toast, dance hall

Ex Output:
dance hall


Ex Input:
tiger, camp, cow, dog, fish

Ex Output:
camp


Ex Input:
hearts, stern, sail, crew, deck

Ex Output:

hearts