Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.

Ex Input:
Category: physical property 
Words: obese, fat, vitamin c, heavy, thin

Ex Output:
vitamin c


Ex Input:
Category: animal 
Words: jump, drive, fly, eagle, beetle

Ex Output:
drive


Ex Input:
Category: aesthetic characteristic 
Words: medium, fair, light, level, sunny

Ex Output:

sunny