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: elephant, duck, sprint, dog, lion

Output: sprint


Input: Consider Input: file, keys, organize, errands, correspondence

Output: keys


Input: Consider Input: sweet roll, fritter, fried, misuse, doughnut


Output: misuse