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: aesthetic characteristic 
Words: ghostly, milky, windy, fair, texture

Output: windy


Input: Consider Input: Category: construction 
Words: dump truck, crane, digger, excavator, swift


Output: swift