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: centimeter, yard, foot, milimeter, head

Output: head


Input: Consider Input: annoyed, fine, exquisite, alert, ok

Output: exquisite


Input: Consider Input: rudder, fold, hull, deck, stern


Output: fold