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:
ticket, fine, pretty, jail, suspension

Ex Output:
pretty


Ex Input:
finger, heel, foot, ounce, elbow

Ex Output:
ounce


Ex Input:
outing, club, meeting, doorstep, picnic

Ex Output:

doorstep