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: iguana, mice, climbing, fish, hamster

SOLUTION: climbing

PROBLEM: descending, remorseful, down, right, ground

SOLUTION: remorseful

PROBLEM: scorching, cold, unflappalbe, hot, cool

SOLUTION:
unflappalbe