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: ocean 
Words: current, data sets, main, sea, wave

Output: data sets


Input: Consider Input: Category: computers 
Words: image, format, reception, file, folder

Output: reception


Input: Consider Input: Category: personal characteristic 
Words: cool, freezing, popular, ethical, classy


Output: freezing