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: miserable, ground, up, opposite of up, down

Output: miserable


Input: Consider Input: fine, prime, firstrate, custody, ok

Output: ok


Input: Consider Input: steam roller, digger, winch, ostrich, crane


Output: ostrich