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.

Input: Consider Input: ring, deck, pack, box, level

Output: pack


Input: Consider Input: round, duplex, flat, smooshed, townhome

Output: smooshed


Input: Consider Input: wave, ant, train, flutter, fly


Output: ant