#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <iterator>

using namespace std;

vector<string> intersection(vector<string> v1, vector<string> v2)
{
    vector<string> res_vec;
    for(auto iter=v1.begin(); iter!=v1.end(); ++iter)
    {
        if(find(v2.begin(), v2.end(), *iter)!=v2.end())
        {
            res_vec.emplace_back(*iter);
            //res_vec.push_back(*iter);
        }
    }
    return res_vec;
}