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#include <bits/stdc++.h>
using namespace std;

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    unsigned long long l, r;
    unsigned long long result = 0;
    cin >> l >> r;

    unsigned long long i = l;
    while (i <= r)
    {
        unsigned long long backup = i;
        while (backup > 0)
        {
            int rem = backup % 10;
            if (rem==0)
            {
                unsigned long long dist =  to_string(i).length() - to_string(backup).length();
                unsigned long long add = 1;
                for (;dist--;) add *= 10;
                i += add-1;
                goto failed;
            }
            backup /= 10;
            if (i%rem) goto failed;
        }

        result++;
        i++;
        continue;
        failed:;
        i++;
    }

    cout << result << "\n";

    return 0;
}