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:
sugar, angular momentum, large, area, fat

Ex Output:
sugar


Ex Input:
resistant, firm, corporation, amalgamated, alignment

Ex Output:

resistant