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, draw, deck, tko, punch

Ex Output:
draw


Ex Input:
ok, wispy, jail, prime, fine

Ex Output:
ok


Ex Input:
belated, water, delayed, current, detestings

Ex Output:

water