#include <bits/stdc++.h>
#define loop(a, b) for(int a = 0; a < b; ++a)
#define loop1(a, b) for(int a = 1; a <= b; ++a)
#define loopc(a, c, b) for(int a = c; a < b; ++a)
#define loopr(a, b) for(int a = b-1; a >= 0; --a)
#define mp make_pair
using namespace std;
typedef unsigned long long ull;
deque<int> aa, bb;
ull ai, bi, p, av=0, bv=0, v;
set<int> pos;
int prev=-1, prev2=-1, as, bs;
int main() {
cin >> ai >> bi;
++bi;
while(ai) {
aa.push_front(ai%10);
ai /= 10;
}
while(bi) {
bb.push_front(bi%10);
bi /= 10;
}
loop(a, 10) pos.insert(a);
as = aa.size();
loop(a, as) {
if (a == 0) {
v = aa[0];
if (as > 1) v *= 9;
loopc(w, 2, as) v *= 8;
av = v;
}
else {
v = aa[a] - (int)(aa[a] > aa[a-1]);
if (a > 1) v -= (int)(aa[a] > aa[a-2]);
loopc(w, a+1, as) v *= 8;
av += v;
}
//cout << av << endl;
}
bs = bb.size();
loop(b, bs) {
//cout << bb[b] << " bb"<< endl;
if (b == 0) {
v = bb[0];
if (bs > 1) v *= 9;
loopc(w, 2, bs) v *= 8;
bv = v;
}
else {
v = bb[b] - (int)(bb[b] > bb[b-1]);
if (b > 1 && bb[b-1] != bb[b-2]) v -= (int)(bb[b] > bb[b-2]);
loopc(w, b+1, bs) v *= 8;
bv += v;
//cout << v << " v" << endl;
}
//cout << bv << endl;
}
cout << bv - av << endl;
return 0;
}
