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

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


def validate(num):
    repeats = False
    repeats_twice = False
    repeatlen = 0
    lastc = None
    nums = str(num)

    for i, c in enumerate(nums):
        if lastc:
            if c < lastc:
                return False  # not rising
        if c == lastc:
            repeats = True
            if repeatlen == 0:
                repeatlen = 2
            else:
                repeatlen += 1
        else:
            if repeatlen == 2:
                repeats_twice = True
            repeatlen = 0

        lastc = c

    return repeats and (repeats_twice or repeatlen == 2)


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

# print(validate(123466))