data = "172930-683082".split("-")

min_, max_ = int(data[0]), int(data[1])


def validate(num):
    repeat = False
    nums = str(num)
    # print(nums)
    for i, c in enumerate(nums):
        if i == len(nums) - 1:
            break
        # print(i, len(nums))
        nextc = nums[i + 1]
        if nextc < c:
            # print(f"not increasing, {nextc} < {c}")
            return False  # not increasing
        if c == nextc:
            # print("found repeat")
            repeat = True
    return repeat


matches = 0
for i in range(min_, max_):
    if validate(i):
        matches += 1
print(matches)


# print(validate(123466))