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: boxing terminology 
Words: ring, lifeline, jab, deck, knockout

Output: lifeline


Input: Consider Input: Category: aesthetic characteristic 
Words: 70, pale, fair, light, milky

Output: 70


Input: Consider Input: Category: secretary duty 
Words: support, file, schedule appointments, order office supplies, software


Output: software