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: deck, knockout, bow, sail, rudder

Output: knockout


Input: Consider Input: ok, mad, fine, bright, annoyed

Output: bright


Input: Consider Input: water, heat, fire, empower, cool


Output: empower