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:
chunky, heavy, fat, area, sugar

Ex Output:
sugar


Ex Input:
elephant, duck, sprint, dog, lion

Ex Output:
sprint


Ex Input:
truss rod, fret, nervous, worried, emotional supports

Ex Output:

truss rod