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: balanced, well, milky, size, fair
Example Output: balanced

Example Input: ashamed, disgusted, emotional upsets, right, down
Example Output: right

Example Input: on top of, close, near, not open, closest
Example Output:
not open