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: ubiquitous, general, basic, major, popular
Example Output: major

Example Input: apartment, round, valley, flat, even
Example Output: valley

Example Input: down, sliding, left, ground, loveful
Example Output:
loveful