#include <iostream>
#include <cstring>
using namespace std;
int main (void) {
    char a[10],b[10],c[10],d[10];
    cin >> a >> b;
    c[1]=a[2];
    c[2]=a[1];
    c[3]=a[0];
    d[1]=b[2];
    d[2]=b[1];
    d[3]=b[0];
    if ((c[1]-'0')*100+(c[2]-'0')*10+(c[3]-'0')>(d[1]-'0')*100+(d[2]-'0')*10+(d[3]-'0')) {
        cout << c[1] << c[2] << c[3];
    }
    else {
        cout << d[1] << d[2] << d[3];
    }
    return 0;
}