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#include <iostream>
using namespace std;

bool Patyk(unsigned long long x) {
    unsigned long long y = x;
    int r=0;
    while(y>0) {
        r = y%10;
        if(r!=0) {
            if(x%r!=0) 
            return false;
        }
        else {
            return false;
        }
        y/=10;
    }
    return true;
}

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

    unsigned long long minimum, maximum;
    long long wynik=0;
    cin>>minimum>>maximum;

    for(unsigned long long i=minimum; i<=maximum; ++i) {
        if(Patyk(i) == true) wynik++;
    }

    cout<<wynik<<'\n';

    return 0;
}