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: boats 
Words: head, hull, knockout, deck, dock

Output: knockout


Input: Consider Input: Category: fried food 
Words: apple, whittle, dumpling, fritter, pie

Output: whittle


Input: Consider Input: Category: animal 
Words: beetle, soar, bee, fly, bird


Output: soar