#include<bits/stdc++.h>

using namespace std;

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n, m;
    cin >> n >> m;
    vector<int> a(n), b(m);
    for (int &i : a)
        cin >> i;
    for (int &i : b)
        cin >> i;
    sort(a.begin(), a.end());
    sort(b.begin(), b.end());
    int ind_a = 0, ind_b = 0;
    vector<int> ans;
    while (ind_a < n && ind_b < m)
    {
        if (a[ind_a] == b[ind_b])
        {
            if (ans.empty() || ans.back() != a[ind_a])
                ans.push_back(a[ind_a]);
            ind_b += 1;
            ind_a += 1;
        }
        else if (a[ind_a] < b[ind_b])
            ind_a += 1;
        else
            ind_b += 1;
    }
    for (int i : ans)
        cout << i << " ";
}