```cpp

include[HTML_REMOVED]

include[HTML_REMOVED]

using namespace std;
int main(){
int len,t,i,j;//如果在循环外定义t初值，那么经过一次循环后t初值不再是0，会超过定义的数组长度

string str,substr;
while(cin>>str>>substr){
     char max=str[0];
     t=0;
    len=str.size();
    for(i=0;i<len;i++){
        if(str[i]>max){
            max=str[i];
            t=i;
        }
    }
    for(i=0;i<=t;i++) cout<<str[i];
    cout<<substr;
    for(i=t+1;i<len;i++) cout<<str[i];
    cout<<endl;

}
return 0;

}