1084

#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
bool h[128] = {false};
int main()
{
	char s1[100],s2[100];
	fgets(s1,100,stdin);
	fgets(s2,100,stdin);
	int len1 = strlen(s1),len2 = strlen(s2);
	for(int i = 0; i < len1; i++)
	{
		int flag = 0;
		if(s1[i] >= 'a' && s1[i] <= 'z') 
		    s1[i] -= 32;
	    int j;
		for(j = 0; j < len2; j++)
		{
			if(s2[j] >= 'a' && s2[j] <= 'z') 
			     s2[j] -= 32;
			if(s2[j] == s1[i])
			{
				flag = 1;
				break;
			}
		}
		if(j == len2 &&flag == 0 && h[s1[i]] == false)
		{
			printf("%c",s1[i]);
			h[s1[i]] = true;
		}
		
	}
	
	return 0;
}