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: trustworthy, decent, fair, tone, ok

A: tone
****
Q: luke, fair, mild, tangle, texture

A: texture
****
Q: fax, file, format, image, document

A:
fax
****