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

Example Input: flamingo, crane, davit, pelican, derrick
Example Output: davit

Example Input: classy, alright, detailed, fine, bright
Example Output:
alright