#include <bits/stdc++.h>
using namespace std;
int starx[1000000] = {}, stary[1000000] = {}, starx2[1000000] = {},
    stary2[1000000] = {};
int main() {
  while (1) {
    int n, m, x, y, roop = 0, a[200][2], b[1000][2], star[10000][2];
    cin >> n;
    if (n == 0) {
      return 0;
    }
    for (int i = 0; i < n; i++) {
      cin >> x >> y;
      starx[x] = 1;
      stary[y] = 1;
      a[i][0] = x;
      a[i][1] = y;
    }
    for (int i = 0; i < n - 1; i++) {
      star[i][0] = a[i + 1][0] - a[0][0];
      star[i][1] = a[i + 1][1] - a[0][1];
    }
    cin >> m;
    for (int i = 0; i < m; i++) {
      cin >> x >> y;
      starx2[x] = 1;
      stary2[y] = 1;
      b[i][0] = x;
      b[i][1] = y;
    }
    for (int i = 0; i < n; i++) {
      for (int j = 0; j < n; j++) {
        if (starx2[b[i][0] + star[j][0]] == 1 &&
            stary2[b[i][1] + star[j][1]] == 1) {
          roop++;
          if (n == roop) {
            cout << b[i][0] - a[0][0] << ' ' << b[i][1] - a[0][1] << endl;
          }
        } else {
          roop = 0;
        }
      }
    }
  }
  return 0;
}
