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: geese, crouch, duck, elephant, mallet
Example Output: crouch

Example Input: chips, punch, deck, draw, queen
Example Output: punch

Example Input: errands, file, format, type, order office supplies
Example Output:
format