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:
up to the moment, current, detests, tide, history

Ex Output:
tide


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

Ex Output:
place


Ex Input:
software, type, motherboard, file, keys

Ex Output:

type