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: guitar part 
Words: fret, worried, chord, notes, headstock

Output: worried


Input: Consider Input: Category: elements 
Words: fire, earth, water, blaze, recruit

Output: recruit


Input: Consider Input: Category: outdoor sport activity 
Words: kayak, trap, horse, fish, hike


Output: horse