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: current, timely, prompt, drink, do tests
Example Output: drink

Example Input: hull, galley, deck, lifeline, tko
Example Output: tko

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