Two analogies that relate objects to the associated rooms is given in the form "A : B. C : ?". "A : B" relates object A to room B. Your task is to replace the question mark (?) with the appropriate room for the given object C, following the "A : B" relation.

Example Input: couch : parlor. bookshelf : ?
Example Output: library

Example Input: crib : bedroom. crib : ?
Example Output: nursery

Example Input: bookshelf : hallway. cupboard : ?
Example Output:
kitchen