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: rudder, bow, pack, crew, deck

SOLUTION: pack

PROBLEM: ok, wispy, jail, prime, fine

SOLUTION: ok

PROBLEM: foot, kilometer, ounce, yard, ankle

SOLUTION:
ankle