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: fire, hire, heat, inferno, earth

SOLUTION: hire

PROBLEM: iguana, mice, climbing, fish, hamster

SOLUTION: climbing

PROBLEM: remorseful, flat, melancholy, down, shameful

SOLUTION:
flat