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: prime, penalty, fine, mad, arrest

SOLUTION: mad

PROBLEM: pie, fried, misuse, fritter, cake

SOLUTION: misuse

PROBLEM: bee, fly, run, bus, leap

SOLUTION:
bus