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:
ice, let go, fire, sack, replace

Ex Output:
ice


Ex Input:
fair, well, milky, medium, loyal

Ex Output:
loyal


Ex Input:
disappointed, file, content, food, shop

Ex Output:

disappointed