#763. Three dice: sum s
You roll three 6-sided dice. In how many ways can the sum be s? (The order matters.)
### Input
One integer s (2 ≤ s ≤ 19).
### Output
A number.
Examples
Input
16
Output
6
Input
15
Output
10
💡 You can solve it with Python, JavaScript or blocks. Read the input line by line with input(). Don't print a question (like input("Number: ")). Print exactly what the output asks for, nothing more.