Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Input: Consider Input: melancholy, descending, emotionalities, emotional, down

Output: descending


Input: Consider Input: pack, hearts, deck, queen, rudder

Output: rudder


Input: Consider Input: prison, comfortable, detached, fine, mad


Output: prison