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: crew, joker, deck, chips, pack

Output: crew


Input: Consider Input: firm, tough, solid, hard, streamline

Output: streamline


Input: Consider Input: file, format, correspondence, keys, firewall


Output: correspondence