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: drill : drill. mop : ?

A: mop
****
Q: unlock : key. type : ?

A: keyboard
****
Q: cut : glass. mop : ?

A:
mop
****