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: file, errands, type, folder, order office supplies
Example Output: folder

Example Input: pack, hearts, deck, queen, rudder
Example Output: rudder

Example Input: excavator, goose, pelican, swift, crane
Example Output:
excavator