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: neat, beautiful, dull, fine, firstrate
Example Output: firstrate

Example Input: level, flat, apartment, squashed, lined
Example Output: lined

Example Input: stormy, light, level, fair, texture
Example Output:
stormy