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: emotional status 
Words: left, emotional state, sad, emotional upsets, down

Ex Output:
left


Ex Input:
Category: poker 
Words: call, sail, deck, board, queen

Ex Output:
sail


Ex Input:
Category: animal 
Words: car, dive, bee, fly, leap

Ex Output:

car