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: outdoor sport activity 
Words: dog, swim, hike, hiking, fish

Output: dog


Input: Consider Input: Category: secretary duty 
Words: fax, program, file, make coffee, answer

Output: program


Input: Consider Input: Category: chocolate food 
Words: fudge, cream, replace, cookies, brownies


Output: replace