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#include<stdio.h>
int main()
{
	char a[100],b[100],c[100];
	scanf("%s",a);
	scanf("%s",b);
	int i,j;
	for(i=0;i<99;i++)
	{
		c[i]='0';
	}
	for(i=0;a[i]!='\0';i++)
	{
		for(j=0;b[j]!='\0';j++)
		{
			if(a[i]==b[j])
				c[i]=a[i];
		}
	}
	for(i=0;i<99;i++)
	{
		if(c[i]!='0')
		{
			printf("%c",c[i]);
		}
	}
		return 0;
	}