#include <bits/stdc++.h>
using namespace std;

template <typename T, typename U> bool cmin(T &a, U b) { return a > b && (a = b, true); }
template <typename T, typename U> bool cmax(T &a, U b) { return a < b && (a = b, true); }

signed main() {
  cin.tie(nullptr);
  ios_base::sync_with_stdio(false);

  int N;
  cin >> N;
  vector<int> W(N);
  for (int i = 0; i < N; i++) cin >> W.at(i);
  int M;
  cin >> M;
  vector<int> B(M);
  for (int i = 0; i < M; i++) cin >> B.at(i);

  multiset<int> MS, MS2;
  for (auto a : W) MS.insert(a);
  for (auto a : B) MS2.insert(a);

  auto X = MS, Y = MS2;

  auto it = --X.end();
  int now = *it;
  X.erase(it);
  int ans = 1;
  while (true) {
    it = Y.lower_bound(now);
    if (it == Y.begin()) break;
    it--;
    now = *it;
    Y.erase(it);
    ans++;
    it = X.lower_bound(now);
    if (it == X.begin()) break;
    it--;
    now = *it;
    X.erase(it);
    ans++;
  }
  
  X = MS2, Y = MS;

  it = --X.end();
  now = *it;
  X.erase(it);
  int ans2 = 1;
  while (true) {
    it = Y.lower_bound(now);
    if (it == Y.begin()) break;
    it--;
    now = *it;
    Y.erase(it);
    ans2++;
    it = X.lower_bound(now);
    if (it == X.begin()) break;
    it--;
    now = *it;
    X.erase(it);
    ans2++;
  }
  
  cout << max(ans, ans2) << "\n";
}