Two analogies that relate actions to the tools used to perform the action is given in the form "A : B. C : ?". "A : B" relates action A to tool B. Your task is to replace the question mark (?) with the appropriate tool for the given action C, following the "A : B" relation.
--------
Question: cut : scissors. iron : ?

Answer: iron


Question: dry : cloth. unlock : ?

Answer: key


Question: hit : hammer. scrub : ?

Answer:
brush