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: emotional status 
Words: ecstatic, excited, content, activity, angry
Example Output: activity

Example Input: Category: emotional status 
Words: board, bored, emotional supports, frustrated, fret
Example Output: board

Example Input: Category: location (proximity) 
Words: bordering, gated, neighboring, touching, close
Example Output:
gated