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#include <bits/stdc++.h>

typedef long long ll;

using namespace std;

bool check(ll n) {
    ll n2 = n;
    
    while(n2) {
        int d = n2%10;
        if(!d || n%d != 0) {
            return false;
        }
        n2 /= 10;
    }

    return true;
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    ll p, q;
    cin >> p >> q;

    int c = 0;
    for(int i = p; i <= q; i++) {
        c += check(i);
    }
    cout << c << "\n";

    return 0;
}