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: fly, fish, flap, bike, glide
Example Output: fish

Example Input: frank, bold, brash, precise, pork
Example Output: pork

Example Input: current, blue, detestings, up to the moment, history
Example Output:
blue