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: colonel, ordinary, standard, ubiquitous, general
Example Output: colonel

Example Input: just, make the grade, well, unjust, fair
Example Output: make the grade

Example Input: level, plane, flat, lined, house
Example Output:
house