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: social gathering 
Words: club, bar, dance hall, discothek, roll

Output: roll


Input: Consider Input: Category: mode of transportation 
Words: swim, bike, soar, fly, jump

Output: jump


Input: Consider Input: Category: construction 
Words: winch, crane, tackle, windlass, digger


Output: tackle