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:
hoist, neck, concrete pourer, hummingbird, crane

Ex Output:
concrete pourer


Ex Input:
falsification, fib, invent, fudge, cupcake

Ex Output:
cupcake


Ex Input:
course, main, current, whirlpool, timely

Ex Output:

timely