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: bike, beetle, leap, ant, fly

Output: bike


Input: Consider Input: bow, duck, sheep, goose, geese

Output: bow


Input: Consider Input: fine, classy, mad, happy, relaxed


Output: classy