#include <iostream>
using namespace std;


int rev (int x) {
    int ret;
    
    ret = x % 10 * 100;
    x /= 10;
    ret += x % 10 * 10;
    x /= 10;
    ret += x % 10;
    
    return ret; }

int a,b,c,d,t;


int main() {
    cin >> a >> b;
    
    c = rev(a); d = rev(b);
    
    t = c; if(d>t) t = d;
    
    cout << t << endl;
    
    //system("pause");
    
}