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: output cord, fret, notes, frustrated, chord

Output: frustrated


Input: Consider Input: wispy, mad, flyaway, penalty, fine


Output: mad