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: bus, fly, swim, spider, flap

A: spider
****
Q: cute, lust, bambi, swoon, fawn

A: bambi
****
Q: fine, there, neat, hot, custody

A:
custody
****