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: lifeline, knockout, deck, punch, tko

A: lifeline
****
Q: fearful, content, substance, program, thing

A: fearful
****
Q: fine, ticket, flyaway, jail, hot

A:
hot
****