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:
fly, leap, glide, car, bike

Ex Output:
leap


Ex Input:
dog, goose, dodge, duck, cat

Ex Output:
dodge


Ex Input:
normal, cadet, standard, general, popular

Ex Output:

cadet