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: bike, flap, fly, walk, wave

SOLUTION: walk

PROBLEM: happy, substance, shop, tools, content

SOLUTION: happy

PROBLEM: ok, fair, medium, variety, cool

SOLUTION:
ok