Digit frequency

Write down every integer from 1 to $n$ in order. Write a program that counts how many times the single digit $d$ appears in what you wrote.

For example, with $n = 11$ and $d = 1$ you write 1 2 3 4 5 6 7 8 9 10 11. The digit 1 appears once in 1, once in 10, and twice in 11, so its frequency is 4.

The first line contains a natural number $n$ ($1 \le n \le 100000$) and a single digit $d$ ($0 \le d \le 9$), separated by one space.

Print on the first line how many times the digit $d$ appears across all the numbers written from 1 to $n$.