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:
neck, swift, egret, tackle, crane

Ex Output:
tackle


Ex Input:
lower, backward, down, falling, shameful

Ex Output:
shameful


Ex Input:
medium, flaxen, fair, equitable, variety

Ex Output:

equitable