#include <iostream>
#include <string.h>
using namespace std;
char s[256], t[256];
int main() {
cin.getline(s, sizeof(s));
cin.getline(t, sizeof(t));
for (int i = 0; i < strlen(s); i++)
if (strchr(t, s[i]))
cout << s[i];
return 0;
}
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