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: fire, blaze, water, flame, recruit
Example Output: recruit

Example Input: happy, fine, mad, level, decent
Example Output: level

Example Input: fudge, rich, pie, truffles, smear
Example Output:
smear