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: activity 
Words: dally, seperate, fritter, waste, fried
Example Output: fried

Example Input: Category: poker 
Words: fold, suits, deck, sail, hearts
Example Output: sail

Example Input: Category: bird 
Words: neck, swift, egret, tackle, crane
Example Output:
tackle