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: mode of transportation 
Words: spider, fly, train, jog, car

Output: spider


Input: Consider Input: Category: emotional status 
Words: down, remorseful, up, emotional supports, shameful

Output: up


Input: Consider Input: Category: corporate 
Words: corporation, firm, synergy, tough, concerted


Output: tough