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#include <stdio.h>

int main()
{
	char s1[100], s2[100];
	scanf("%s", &s1);
	scanf("%s", &s2);
	
	int i, j;
	char s[100];
	int n = 0;
	for(i = 0; s2[i] != '\0'; i++)
	{
		for(j = 0; s1[j] != '\0'; j++)
		{
			if(s2[i] == s1[j])
			{
				int k, flag = 1;
				for(k = 0; k < n; k++)
				{
					if(s[k] == s2[i])
					{
						flag == 0;
						break;
					}
				}
				if(flag == 1)
				{
					s[n] = s2[i];
					n++;
				}
			}
		}
	
	}
	
	for(i = 0; i < n; i++)
	{
		printf("%c", s[i]);
	}

	return 0;
}