#include<iostream>
#include<string>
using namespace std;
int main(){
    string str,substr;
    while(cin>>str>>substr){
        int max_ascii=0;
        int max_postion=0;
        for(int i=0;str[i];i++){
            if(int(str[i])>max_ascii) {max_ascii=str[i];max_postion=i;}
        }
        cout<<str.substr(0,max_postion+1)<<substr<<str.substr(max_postion+1)<<endl;
    }
}