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: current, wave, whirlpool, sea, data sets

Output: data sets


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

Output: crew


Input: Consider Input: stern, frank, harsh, matter of fact, goodies


Output: goodies