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.

Example Input: firm, tough, solid, hard, streamline
Example Output: streamline

Example Input: tide, current, flow, detests, whirlpool
Example Output: detests

Example Input: general, lieutenant, commander, ordinary, captain
Example Output:
ordinary