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: emotional state, opposite of up, unhappy, down, miserable
Example Output: opposite of up

Example Input: ghostly, fair, level, light, tangle
Example Output:
tangle