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.

Ex Input:
Category: mode of transportation 
Words: bus, fly, jog, beetle, drive

Ex Output:
beetle


Ex Input:
Category: food 
Words: frank, entree, goodies, concise, wiener

Ex Output:
concise


Ex Input:
Category: consumer product 
Words: merchandise, nervous, program, content, shop

Ex Output:

nervous