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.

Example Input: Category: geographical property 
Words: studio, hill, flat, even, horizontal
Example Output: studio

Example Input: Category: outdoor sport activity 
Words: hiking, climbing, mice, fish, row
Example Output: mice

Example Input: Category: store status 
Words: slow, gated, nearer, close, open
Example Output:
nearer