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.

Example Input: Category: shady activities 
Words: falsification, fib, invent, fudge, cupcake
Example Output: cupcake

Example Input: Category: food 
Words: provision, frank, hot dog, goodies, harsh
Example Output: harsh

Example Input: Category: widespread 
Words: typical, fighter, ordinary, common, general
Example Output:
fighter