include <stdio.h>

int main() {

int a, b, i, m, n, c = 0;
scanf("%d%d", &m, &n);
for (int i = n; i <= m; i++) {
	int a = i;
	while (a > 0) {
		int b = a % 10;
		if (b == n) {
			c++;

		}
		a = a / 10;
	}
}
printf("%d", c);

return 0;

}