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