#include <iostream>
#include <cstring>

using namespace std;

int main(void) {
    string str, substr;
    while (cin >> str >> substr) {
        int idx = 0;
        for (int i = 0; i < str.size(); i++) {
            if (str[i] > str[idx]) {
                idx = i;
            }
        }
        str.insert(idx + 1, substr);
        cout << str << endl;
    }
}