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.

Example Input: stir : spoon. hit : ?
Example Output: hammer

Example Input: unlock : key. eat : ?
Example Output: fork

Example Input: toast : toaster. drill : ?
Example Output:
drill