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: duck, bend, ostrich, jog, stoop

A: ostrich
****
Q: hiking, stingray, shark, fish, tiger

A: hiking
****
Q: merchandise, substance, specialty, content, angry

A:
angry
****