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:
egret, crane, goose, dump truck, duck

Ex Output:
dump truck


Ex Input:
honorable, medium, trustworthy, fair, balanced

Ex Output:
medium


Ex Input:
retire, blaze, instruct, fire, replace

Ex Output:

blaze