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:
egret, mallet, tackle, davit, crane

Ex Output:
tackle


Ex Input:
clime, level, cool, tone, fair

Ex Output:
clime


Ex Input:
books, tools, shop, joyful, content

Ex Output:

joyful