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: fly, flutter, bus, drive, fish

Output: fish


Input: Consider Input: crane, winch, mallet, winch, flamingo

Output: winch


Input: Consider Input: suspension, money, custody, happy, fine


Output: happy