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:
trustworthy, well, fair, loyal, stormy

Ex Output:
stormy


Ex Input:
raining, tone, even, fair, cool

Ex Output:

raining


