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:
kind, down, sad, backward, emotionalities

Ex Output:
backward


Ex Input:
cookies, replace, fudge, banned, lie

Ex Output:
cookies


Ex Input:
beer, gin, tequila, pinochle, rum

Ex Output:

pinochle