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:
pale, windy, fair, flaxen, light

Ex Output:
windy


Ex Input:
fat, obese, iron, sugar, sugars

Ex Output:
obese


Ex Input:
parrot, pelican, digger, swift, crane

Ex Output:

digger