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: galley, head, suits, deck, dock
Example Output: suits

Example Input: hot, classy, pretty, fine, probation
Example Output: probation

Example Input: crane, upraise, winch, davit, steam roller
Example Output:
winch