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.

Input: Consider Input: Category: accomodation 
Words: apartment, cabin, squashed, smooth, flat

Output: smooth


Input: Consider Input: Category: geographical property 
Words: mountain, flat, hill, mansion, plain

Output: mansion


Input: Consider Input: Category: physical property 
Words: obese, fat, iron, capacitance, bulky


Output: iron