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.

Ex Input:
iguana, mice, climbing, fish, hamster

Ex Output:
climbing

Ex Input:
horse, trap, tiger, sea turtle, fish

Ex Output:
trap

Ex Input:
loveful, down, emotional, backward, emotionalities

Ex Output:
backward