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: ring, deck, pack, box, level
Example Output: pack

Example Input: crane, ostrich, davit, dump truck, pelican
Example Output: dump truck

Example Input: tiger, climbing, kayak, fish, wrestle
Example Output:
tiger