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: iguana, mice, climbing, fish, hamster

A: climbing
****
Q: slow, shut, close, beside, out of service

A: beside
****
Q: davit, crane, ostrich, egret, davit

A:
davit
****