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: windlass, excavator, crane, hummingbird, steam roller

Output: hummingbird


Input: Consider Input: leap, bee, glide, fly, eagle

Output: glide


Input: Consider Input: walk, flap, fish, fly, bats


Output: flap