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: jack, string, crying, neck, fret
Example Output: crying

Example Input: promote, empower, fire, ice, ban
Example Output: ice

Example Input: crane, concrete pourer, heron, sandpiper, duck
Example Output:
concrete pourer