#include <iostream>
#include <math.h>
using namespace std;

int main () {
    int i,a,b,m[5],n[5];
    
    cin >> a >> b;
    //m=n=0;
    for (i=1; i<=3; i++) {
        m[i]=a%10;
        n[i]=b%10;
        a=a/10; 
        b=b/10;
        }
    
    int m1=m[1]*100+m[2]*10+m[3];
    int n1=n[1]*100+n[2]*10+n[3];
    if (n1>m1) cout << n1;
    else cout << m1;
    //system ("pause");
    return 0;
}