task2

import math
l, r = input().split()
l = int(l)
r = int(r)
q = 0
stepen = math.log10(r)
for i in range(l, r + 1):
    if i < 10:
        q += 1
        continue
    cifri = int(math.log10(i)) + 1
    k = i // (10 ** int(math.log10(i)))
    if (i == k * (10 ** cifri - 1) / 9):
        q += 1
print(q)