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.

Input: Consider Input: poster : tube. potatoes : ?

Output: sack


Input: Consider Input: detergent : bottle. potatoes : ?

Output: sack


Input: Consider Input: trash : can. cereal : ?


Output: box