Two analogies that relate items to the associated containers is given in the form "A : B. C : ?". "A : B" relates item A to its associated container B. Your task is to replace the question mark (?) with the appropriate container for the given item C, following the "A : B" relation.

Example Input: game : box. milk : ?
Example Output: jug

Example Input: chips : bag. kleenex : ?
Example Output: box

Example Input: trash : can. potatoes : ?
Example Output:
sack