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: fawn, love, calf, flatter, identity
Example Output: calf

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

Example Input: tone, fair, ghostly, even, endure
Example Output:
endure