#include <iostream>
#include <vector>
using namespace std;
const int maxn = 25;
typedef long long ll;

vector<int> v1, v2;
ll dp[maxn][4][4][4];
int sz;
ll rek(int at, int max_digit, int min_digit, int has_started) {
    if(at == sz) {
        return (ll) has_started;
    }
    if(dp[at][max_digit][min_digit][has_started] != -1) {
        return dp[at][max_digit][min_digit][has_started];
    }
    ll res = 0LL;

    int tmp_min_digit = v1[at];
    if(min_digit) {
        tmp_min_digit = 0;
    }
    int tmp_max_digit = v2[at];
    if(max_digit) {
        tmp_max_digit = 9;
    }

    for(int i = tmp_min_digit; i <= tmp_max_digit; i++) {
        ll tmp = 1LL;
        int tmp_started = (has_started or i > 0);
        if(has_started or i > 0) {
            tmp = (ll) i;
        }
        int m1 = min_digit;
        if(min_digit == 0) {
            if(i > tmp_min_digit) {
                m1 = 1;
            }
        }
        int m2 = max_digit;
        if(max_digit == 0) {
            if(i < tmp_max_digit) {
                m2 = 1;
            }
        }
        res = max(res, rek(at + 1, m2 , m1, tmp_started) * tmp);
    }
    return dp[at][max_digit][min_digit][has_started] = res;
}

ll backtrack(int at, int max_digit, int min_digit, int has_started) {
    if(at == sz) {
        return has_started;
    }

    ll res = dp[at][max_digit][min_digit][has_started];

    int tmp_min_digit = v1[at];
    if(min_digit) {
        tmp_min_digit = 0;
    }
    int tmp_max_digit = v2[at];
    if(max_digit) {
        tmp_max_digit = 9;
    }

    for(int i = tmp_min_digit; i <= tmp_max_digit; i++) {
        ll tmp = 1LL;
        int tmp_started = (has_started or i > 0);
        if(has_started or i > 0) {
            tmp = (ll) i;
        }
        int m1 = min_digit;
        if(min_digit == 0) {
            if(i > tmp_min_digit) {
                m1 = 1;
            }
        }
        int m2 = max_digit;
        if(max_digit == 0) {
            if(i < tmp_max_digit) {
                m2 = 1;
            }
        }

        if(res == rek(at + 1, m2 , m1, tmp_started) * tmp) {

            if(tmp_started) {
                cout << i;

            }
            backtrack(at + 1, m2 , m1, tmp_started);
            break;
        }
    }
    return res;
}
int main(){
    ll a, b;
    cin >> a >> b;
    memset(dp, -1, sizeof dp);
    while(a) {
        v1.push_back(a % 10);
        a /= 10;
    }
    while(b) {
        v2.push_back(b % 10);
        b /= 10;
    }
    if(v1.size() < v2.size()) {
        while(v1.size() < v2.size()) {
            v1.push_back(0);
        }
    }
    if(v2.size() < v1.size()) {
        while(v2.size() < v1.size()) {
            v2.push_back(0);
        }
    }
    reverse(v1.begin(), v1.end());
    reverse(v2.begin(), v2.end());
    sz = max((int) v1.size(), (int) v2.size());

    rek(0, 0, 0, 0) ;
    backtrack(0, 0, 0, 0);
    return 0;
}