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: current, history, wave, jetstream, whirlpool

SOLUTION: history

PROBLEM: squashed, cabin, flat, smooth, round

SOLUTION: smooth

PROBLEM: fly, walk, grasshopper, dive, waggle

SOLUTION:
walk