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: ok, neat, fine, attractive, beautiful

Output: ok


Input: Consider Input: knockout, blocking, crew, tko, deck

Output: crew


Input: Consider Input: prison, wispy, flyaway, fine, alert


Output: alert