def get_count_digits_init(n: int, d: int) -> int:
    return str(n).count(str(d))


MAX_N = 10001
count_digits_init = [[0, 0, 0, 0, 0, 0, 0, 0, 0, 0] for _ in range(MAX_N)]

if __name__ == '__main__':
    for i in range(1, MAX_N):
        for d in range(10):
            count_digits_init[i][d] = get_count_digits_init(i, d) + count_digits_init[i - 1][d]
    # with open('dh_20260909_11_count_digits_init.out', 'w') as f:
    #     f.write(str(count_digits_init).replace(" ", "").replace("]", "}").replace("[", "{"))

    n, d = map(int, input().split())
    print(count_digits_init[n][d])