TASK DEFINITION: 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.
PROBLEM: pack, hearts, deck, queen, rudder

SOLUTION: rudder

PROBLEM: horse, trap, tiger, sea turtle, fish

SOLUTION: trap

PROBLEM: cool, fair, ghostly, deal, size

SOLUTION:
deal