//
//
//  Codeforces: ganariya
//  AtCoder: ganariya2525
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//include
//------------------------------------------
#include <vector>
#include <list>
#include <map>
#include <unordered_map>
#include <climits>
#include <set>
#include <unordered_set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>
#include <queue>
#include <random>
#include <complex>
#include <regex>
#include <locale>
#include <random>
#include <type_traits>

using namespace std;

#define SHOW_VECTOR(v) {std::cerr << #v << "\t:";for(const auto& xxx : v){std::cerr << xxx << " ";}std::cerr << "\n";}
#define SHOW_MAP(v){std::cerr << #v << endl; for(const auto& xxx: v){std::cerr << xxx.first << " " << xxx.second << "\n";}}

using LL = long long;

//~~~~~~~~~~~~~~~~~~~~~_(＾～＾ ｣ ∠)_~~~~~~~~~~~~~~~~~~~~~

int main() {

    while (true) {

        int m;
        cin >> m;

        if (m == 0) break;

        vector<pair<int, int>> a(m);
        for (int i = 0; i < m; i++) {
            int x, y;
            cin >> x >> y;
            a[i] = make_pair(x, y);
        }

        int n;
        cin >> n;

        vector<pair<int, int>> b(n);
        map<pair<int, int>, bool> mp;
        for (int i = 0; i < n; i++) {
            int x, y;
            cin >> x >> y;
            b[i] = make_pair(x, y);
            mp[make_pair(x, y)] = true;
        }

        for (int i = 0; i < n; i++) {
            int dy = b[i].second - a[0].second;
            int dx = b[i].first - a[0].first;
            bool good = true;
            for (int j = 0; j < m; j++) {
                int toY = dy + a[j].second;
                int toX = dx + a[j].first;
                if (mp.count(make_pair(toX, toY))) continue;
                good = false;
            }
            if (good) {
                cout << dx << " " << dy << endl;
                break;
            }
        }

    }

}







































Measured memory_bytes: 3148