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: ghostly, fair, medium, cold, well

Output: cold


Input: Consider Input: fat, sugar, ugly, chunky, angular momentum

Output: sugar


Input: Consider Input: bats, pounce, cockroach, bike, fly


Output: bike