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: employment activity 
Words: replace, ice, fire, ban, hire

Output: ice


Input: Consider Input: Category: computers 
Words: image, support, file, space, hardware


Output: support