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: bats, pounce, cockroach, bike, fly

SOLUTION: bike

PROBLEM: concerned, strap lock, anxious, bored, fret

SOLUTION: strap lock

PROBLEM: fish, hiking, row, shark, canoe

SOLUTION:
shark