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

Example Input: level, tone, fair, impartial, milky
Example Output: impartial

Example Input: sandpiper, derrick, heron, crane, hoist
Example Output:
derrick