View Code of Problem 22

#include<cstdio>
#include<iostream>
#include<algorithm>
#include<cmath>
#include<cstring>
#include<vector>
#include<map>
#include<string>
#include<set>
using namespace std;
int main(void){
	string a,b,c="";
	while(getline(cin,a)&&getline(cin,b)){
		for(int i=0;i<a.length();i++)
		{
		   for(int j=0;j<b.length();j++)
		   {
		      
		   	if(a[i]==b[j])
		   	{
		   		c=c+a[i];
		   		b[j]='0';
		   		break;
			}
		
		   }
		}
		
		sort(c.begin(),c.end());
		cout<<c<<endl;
		c="";
	}
}