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: color, medium, fair, warm, size
Example Output: warm

Example Input: loveful, up, down, remorseful, melancholy
Example Output: up

Example Input: wave, current, history, delayed, late
Example Output:
wave