#include <iostream>
using namespace std;
int main()
{
string s1, s2;
while (cin >> s1 >> s2)
{
int pos = 0;
for (int i = 1; i < s1.size(); i ++ )
{
if (s1[i] > s1[pos]) pos = i;
}
cout << s1.substr(0, pos + 1) + s2 + s1.substr(pos + 1) << endl;
}
return 0;
}