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: nutritional value 
Words: fat, protein, vitamin c, fiber, area

Ex Output:
area


Ex Input:
Category: measurement unit 
Words: meter, inch, foot, heel, pound

Ex Output:
heel


Ex Input:
Category: type of sandwich 
Words: meeting, club, blt, hero, hamburger

Ex Output:

meeting