Cupcake Party

A regular box of cupcakes holds 8 cupcakes, while a small box holds 3 cupcakes. There are 28 students in a class and a total of at least 28 cupcakes. Your job is to determine how many cupcakes will be left over if each student gets one cupcake.

The input consists of two lines.

• The first line contains an integer R ≥ 0, representing the number of regular boxes.
• The second line contains an integer S ≥ 0, representing the number of small boxes.

Output the number of cupcakes that are left over.