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:
fair, mild, loyal, alright, trustworthy

Ex Output:
mild


Ex Input:
iguana, mice, climbing, fish, hamster

Ex Output:
climbing


Ex Input:
picnic, doorstep, cinema, club, group

Ex Output:

doorstep