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:
fair, pale, 70, clime, tangle

Ex Output:
pale


Ex Input:
shut down, close, shut, open, touching

Ex Output:

touching