#include <iostream>
using namespace std;

int main () {
             
             int a, a1 = 1, b, b1 = 1; cin >> a >> b;
             a1 = a % 10; a /= 10;
             b1 = b % 10; b /= 10;
             
             while (a > 0) {
                            
                            a1 = (10 * a1 ) + (a % 10);
                            a /= 10;
                            
                            }
             
             while (b > 0) {
                            
                            b1 = (b1 * 10) + (b % 10);
                            b /= 10;
                            
                            }
             
             cout << (a1 > b1 ? a1 : b1);
             
             return 0;
             }