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:
ice, let go, fire, sack, replace

Ex Output:
ice


Ex Input:
hoagie, submarine, place, open-faced, club

Ex Output:
place


Ex Input:
frank, precise, loyalty, grub, stern

Ex Output:

grub