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: fret, nervous, board, fingerpick, jack

A: nervous
****
Q: crane, pelican, egret, hummingbird, upraise

A: upraise
****
Q: bus, leap, spider, run, fly

A:
bus
****