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: activity 
Words: dally, goodbye, fritter, whittle, dumpling

Output: dumpling


Input: Consider Input: Category: bird 
Words: dump truck, tackle, crane, hoist, davit

Output: dump truck


Input: Consider Input: Category: computers 
Words: format, file, support, text, download


Output: support