//
// Created by lan on 2013/1/1.
//
字符串插入
#include<iostream>
using namespace std;
int main() {
string str1, str2;
while (cin >> str1 >> str2) {
int index = 0;
for (int i = 0; i < str1.size(); i++) {
if (str1[i] > str1[index]) {
index = i;
}
}
cout << str1.substr(0, index + 1) + str2 + str1.substr(index + 1) << endl;
}
return 0;
}