#include <cstdio>
#include <iostream>

using namespace std;


int main(void){
    int a,b,c,d;
    scanf("%d %d",&a,&b);
    c=(a%10)*100;
    a/=10;
    c+=(a%10)*10;
    a/=10;
    c+=a;
    d=(b%10)*100;
    b/=10;
    d+=(b%10)*10;
    b/=10;
    d+=b;
    if (c>d) printf("%d\n",c);
    else printf("%d\n",d);
    return 0;
}