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.

[Q]: iron : iron. toast : ?
[A]: toaster


[Q]: crack : nutcracker. clamp : ?
[A]: clamp


[Q]: unlock : key. bake : ?
[A]:
oven