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: aesthetic characteristic 
Words: fine, custody, level, beautiful, attractive

Output: custody


Input: Consider Input: Category: emotional status 
Words: nervous, frustrated, fret, jack, concerned

Output: jack


Input: Consider Input: Category: corporate 
Words: corporation, stiff, firm, amalgamated, alignment


Output: stiff


