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: refrigerator : kitchen. desk : ?
Example Output: office

Example Input: toolbox : garage. bookshelf : ?
Example Output: library

Example Input: car : garage. closet : ?
Example Output:
hallway