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.

Example Input: hoist, neck, concrete pourer, hummingbird, crane
Example Output: concrete pourer

Example Input: size, equitable, fair, alright, fine
Example Output: size

Example Input: dog, geese, duck, crouch, swan
Example Output:
crouch