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: air, fire, hire, ban, promote

Output: air


Input: Consider Input: blocking, crew, jab, deck, glove

Output: crew


Input: Consider Input: head, elbow, leg, foot, yard


Output: yard