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: mode of transportation 
Words: bus, fly, jog, beetle, drive

Output: beetle


Input: Consider Input: Category: moral characteristic 
Words: concise, frank, matter of fact, pork, blunt

Output: pork


Input: Consider Input: Category: guitar part 
Words: fret, headstock, fingerpick, jack, nervous


Output: nervous