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.

Ex Input:
level, smooth, flat, lined, elevation

Ex Output:
level


Ex Input:
hoist, neck, concrete pourer, hummingbird, crane

Ex Output:
concrete pourer


Ex Input:
current, prompt, dastards, brine, timely

Ex Output:

brine