a, b = int(input()), int(input())


is_good_number = True
count = 0
for number in range(a, b+1):

    for i in range(len(str(number))):
        digit = str(number)[i]
        if digit == '0' or number % int(digit) == 0:
            is_good_number = True
        elif number % int(digit) != 0:
            is_good_number = False
            break

    if is_good_number:
        count += 1

print(count)