#include<bits/stdc++.h>
using namespace std;
string s,a;
int main(){
    cin>>s>>a;
    cout<<s;
    for(int i=0;i<s.size();++i){
        for(int j=0;j<a.size();++j){
            if(a[j]==s[i]) a[j]=' ';
        }
    }
    for(int j=0;j<a.size();++j){
        if(a[j]==' ') continue;
        else cout<<a[j];
    }
    return 0;
}
/**************************************************************
	Problem: 1105
	User: chenlingxuan
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2076 kb
****************************************************************/