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: glove, ring, deck, box, bow
Example Output: bow

Example Input: miserable, ground, up, opposite of up, down
Example Output: miserable

Example Input: box, glove, hearts, canvas, deck
Example Output:
hearts