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:
basic, general, common, plain, admiral

Ex Output:
admiral


Ex Input:
corner, ring, crew, deck, apron

Ex Output:
crew


Ex Input:
cold, swim, plummet, fall, exercise

Ex Output:

cold