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.

Q: vittles, integrity, cheese, pork, frank

A: integrity
****
Q: motherboard, schedule appointments, schedule, file, type

A: motherboard
****
Q: relaxed, cool, optimist, ethical, cold

A:
cold
****