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: elements 
Words: ban, fire, combustion, ground, flame

Output: ban


Input: Consider Input: Category: location (proximity) 
Words: near, close, gated, bordering, on top of

Output: gated


Input: Consider Input: Category: season 
Words: swim, leaves, fall, hiems, spring


Output: swim