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#include <iostream>

bool lp(long long a){
    long long t = a;
    while(t > 0){
        if(t % 10 == 0)
            return false;
        if(a % (t%10) != 0)
            return false;
        t = t/10;
    }
    return true;
}

int main() {
    long long a, b;
    std::cin >> a;
    std::cin >> b;
    long long w = 0;
    for (long long i = a; i <= b; ++i) {
        if(lp(i))
            w++;
    }
    std::cout << w;


    return 0;
}