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:
finger, heel, foot, ounce, elbow

Ex Output:
ounce


Ex Input:
output cord, chord, concerned, amp, fret

Ex Output:

concerned