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#include <iostream>
bool isLic(long long x)
{
    long long temp = x;
    while(temp%10 and not (x % (temp%10)))
    {
        temp/=10;
    }
    return not temp%10;
}

int main()
{
    long long x,y;
    std::cin>>x>>y;
    long long c = 0;
    for(x; x<=y; ++x)
    {
        if(isLic(x)) ++c;
    }
    std::cout << c;
    return 0;
}