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: type of rigidity 
Words: tough, taut, rough, amalgamated, firm

Output: amalgamated


Input: Consider Input: Category: emotional status 
Words: down, remorseful, up, emotional supports, shameful

Output: up


Input: Consider Input: Category: emotional status 
Words: output cord, anxious, sad, fret, emotional state


Output: output cord