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: climbing, cow, hiking, fish, wrestle
Example Output: cow

Example Input: knockout, blocking, crew, tko, deck
Example Output: crew

Example Input: fudge, banned, brownies, cookies, cake
Example Output:
banned