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: glass, wood, coating, knifer, woodwork
Example Output: knifer

Example Input: flyaway, penalty, prime, fine, comfortable
Example Output: comfortable

Example Input: open-faced, outing, community, club, meeting
Example Output:
open-faced