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: recruit, replace, sack, heat, fire

SOLUTION: heat

PROBLEM: hire, flame, pay, fire, ban

SOLUTION: flame

PROBLEM: relaxed, icy, cool, unruffled, ethical

SOLUTION:
icy