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:
level, flat, apartment, squashed, lined

Ex Output:
lined


Ex Input:
delayed, brine, belated, current, postponed

Ex Output:
brine


Ex Input:
current, wave, drink, blue, history

Ex Output:

history