#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

int main(){
  int place[100000] = {0};
  int size1, size2, tmp;
  ifstream f;
  f.open("/Users/p/Documents/Saddle/Tasks24/input.txt");
//  f.open("input.txt");
  f >> size1;
  f >> size2;

  for(int i=0; i < size1; i++){
    f >> tmp;
    if (place[tmp]==0) {
      place[tmp] = 1;
      cout << "num saved: " << tmp << "\n";
    }
  }

  for(int i=0; i < size2; i++){
    f >> tmp;
    if (place[tmp]==1) {
      place[tmp] = 2;
      cout << "intersection found: " << tmp << "\n";
    }
  }
  f.close();

  ofstream f2;
  f2.open("/Users/p/Documents/Saddle/Tasks24/output.txt");
//  f2.open("output.txt");
  for (int i=0; i <= 100000; i++){
    if (place[i]==2) f2 << i << " ";
  }
  f2.close();

  return 0;
}