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: crew, ring, deck, blocking, punch
Example Output: crew

Example Input: cupcake, fudge, tart, smear, cream
Example Output: smear

Example Input: relaxed, mad, fine, exquisite, calm
Example Output:
exquisite