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#include<stdio.h>
void main ()
{
	char A[20],B[20],C[20];
	int i=0,j=0,k=0;

	scanf("%s",B);
	scanf("%s",A);

	for(i=0;A[i]!='\0';i++)
	{
		for(j=0;B[j]!='\0';j++)
		{	
			if (A[i]==B[j])
			{
				C[k]=A[i];
				A[i]=0;
				B[j]=0;
				k++;
			}
		}
	}
	
	printf("%s",C);
}