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.

Ex Input:
bed : bedroom. recliner : ?

Ex Output:
den


Ex Input:
recliner : den. bookshelf : ?

Ex Output:
library


Ex Input:
workbench : workshop. couch : ?

Ex Output:

parlor