#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: hongjiaming
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2076 kb
****************************************************************/