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, shareholders, common, alignment, taut
Example Output: taut

Example Input: fat, calories, vitamin c, absorption, carbs
Example Output: absorption

Example Input: deck, caution, call, draw, pack
Example Output:
caution