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:
balanced, well, milky, size, fair

Ex Output:
balanced


Ex Input:
ring, deck, pack, box, level

Ex Output:
pack


Ex Input:
fawn, suppressed, swoon, buck, follow

Ex Output:

buck